In humans, the uniqueness of offspring is ensured by crossing-over, independent assortment during meiosis, and random fertilization.
In humans, meiosis and fertilization ensure the production of genetically unique offspring through three main mechanisms.
The first event is crossing-over during prophase I of meiosis, where homologous chromosomes exchange genetic material, creating new combinations of alleles. The second event is independent assortment, the random separation of parental chromosomes during metaphase I, which leads to a diverse set of potential gametes. The third event is the random fertilization of an egg by a sperm cell, which combines two sets of chromosomes to restore the diploid state, with the chance of creating a zygote with any combination of chromosomes from the parents, adding to the genetic diversity.The result of these three processes ensures that any two offspring will almost certainly have a different genetic makeup, even if they come from the same set of parents. Thus, meiosis followed by fertilization increases genetic variation and is fundamental to the concept of sexual reproduction in eukaryotes, which includes humans.
An mRNA strand has 204 bases to code for a protein from start to stop. how many amino acids will the resulting protein contain
The mRNA strand with 204 bases will code for a protein containing 67 amino acids, as each amino acid is defined by a three-nucleotide sequence, the codon. The subtraction of one is due to the stop codon which does not code for an amino acid.
Explanation:A protein sequence is made up of a chain of amino acids, each of which is coded by a three-nucleotide sequence in mRNA, known as a codon. Based on the number of bases in the mRNA strand, we can determine how many amino acids it will produce by dividing the total number of bases by three. In this case, the mRNA stand has 204 bases. However, the start and stop codons are also included in this count. So with 204 bases and 3 bases per codon, we have 68 codons. However, since one of these is a stop codon which does not code for an amino acid, the resulting protein will contain 67 amino acids.
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What are cells that express the same genes?
similar
different
mutated
not living
Answer:
Similar
Explanation:
Similar cells are the cells that express the same genes and perform the same function. Similar cells contain or store the same genetic instructions for performing similar specific functions. Cells are the basic structural and functional unit of a living organism. Cells are usually microscopic, and consist of a quantity of protoplasm surrounded by a cell membrane. Cells are able to synthesize proteins, and can replicate themselves independently. The two types of cells are; eukaryotic (cells with true nucleus) cells, and prokaryotic cells (cells without true nucleus).
Which type of electromagnetic radiation is the only type that humans can see with their eyes? (2 points) Gamma rays Ultraviolet rays Visible waves Rays
Humans can only see visible light, with a wavelength range of 380 to 740 nm, which falls within the larger electromagnetic spectrum.
The type of electromagnetic radiation that humans can see with their eyes is called visible light. This form of radiation has wavelengths that range between approximately 380 and 740 nanometers (nm). The electromagnetic spectrum is vast and includes other types of radiation like gamma rays, ultraviolet rays, infrared light, microwaves, and radio waves, none of which can be seen by the human eye. Visible light represents a very small portion of the electromagnetic spectrum but is essential for human vision, as our eyes are sensitive to this range of wavelengths.
Gamma rays have the shortest wavelengths and are highly energetic and potentially harmful, but they are absorbed by Earth's atmosphere. Ultraviolet (UV) rays have slightly longer wavelengths than visible light but are still too short for us to see. Infrared light has longer wavelengths and can be felt as heat rather than seen. Radio waves have the longest wavelengths and the least energy and are also not visible to humans. The capacity to see visible light is an evolutionary adaptation to the types of waves that effectively reach Earth from the sun and penetrate our atmosphere without being blocked except by clouds.
Certain bacteria living in a human's large intestine help to produce vitamin K. The bacteria get nutrients from the human. This relationship is an example of * mutualism commensalism plant parasitism animal parasitism
the process of mechanical weathering when Rock cracks and flakes off its called__?
Pinworms have smooth bodies, bilateral symmetry, and complete digestive tracts. What type of animal are they? cnidarians flatworms annelids nematodes
when a cell undergoes mitosis,what is the result?
When a cell undergoes mitosis, it forms two daughter cells which have the same number of chromosomes as the parent cell.
What is mitosis?Mitosis is a process used to create more cells that share the same genetic makeup as the parent cell. It is crucial for the growth and development of human bodies as well as for the embryonic development of living things. Mitosis generates new cells and replaces injured, destroyed, or aging ones.
Somatic cells undergo mitosis, which means that all cell types whose function is not the generation of gametes go through this process. Each chromosome is duplicated before each mitotic division, resulting in a full set of chromosomes in the nucleus of each new cell after division.
Thus, when a cell undergoes mitosis, it forms two daughter cells which have the same number of chromosomes as the parent cell.
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Which of the following threats to biodiversity is a result of plants and animals introduced to an ecosystem where they are not normally found?
Answer:
THe answer is D Invasive species
Explanation:
I hope this helps
What kind of mixture is blood
Answer:
Blood is a colloid which mainly contains red and white blood-cells, lymphocytes and plasma.
Explanation:
Believe it or not but blood is considered an organ. That’s because it contains a collection of different types of cells suspended in a liquid, the plasma.
The most obvious type of cell is the red blood cell (erythrocytes), which provides the red color to the blood and more importantly contains haemoglobin, an iron holding protein that binds oxygen or carbon dioxide. This way these gases are transported throughout the body. Oxygen towards the tissues, carbon dioxide outward of course.
Another very important blood cell type are the white ones (leukocytes). Without going into much detail (a lot of different subtypes exist) the white blood cells are responsible for one’s immunity. Some of these cells called macrophages like to swallow stuff that’s not supposed to be in your blood.
A third important type of cell, the smallest ones, are the trombocytes or platelets. The make sure you blood coagulates when you are wounded. Without them you would bleed to death.
Besides these cells a lot of different molecules or ions are dissolved or suspended in the plasma : proteins of which a lot of albumin, vitamins, minerals. The steady bloodstream makes sure every cell in your body is provided with the nutrients it needs.
Which part of the electromagnetic spectrum can humans see with the naked eye? Infrared light
Ultraviolet rays
Visible light
X-rays
The answer is visible light. I have it in my notes.
Answer: B: Visible Light.
Explanation: One thing that I can say is that it is "Visible" it has it in the name but also visible light is a the part of the electromagnetic spectrum that is visible to eyes.
The cytoplasm is the watery fluid found within cells. The cytoplasm holds all of the organelles, except _______, in place within the cell.
THE ANSWER IS
the nucleus
What is true of the genetic makeup of all body cells in the human body except for sex cells?
A.) It is different based on the cell type.
B.) It is the same no matter what the cell type.
C.) It is random even within the same cell type.
D.) It is used to sort cells into organs based on chromosomal differences.
Answer: yes the answer is B) it is the same no matter what the cell type.
Explanation: I took the test! Hope this helps! <3
Ponds and lakes form when water collect in ... areas of land
Which body parts do sharks have that whales lack?
A-eye
B-gills
C-dorsal fin
D-mouth
E-pectoral fin
F-tail
The body parts that sharks have that whales lack are the dorsal fin and pectoral fin, which are options C and E, respectively. The sharks have a dorsal fin, which is a large, pointed fin on their back that helps them maintain stability and steer through the water.
Sharks and whales are two very different types of aquatic animals, and they have many physical differences. Two of the key differences between sharks and whales are the presence of dorsal fins and pectoral fins in sharks and their absence in whales. The dorsal fin is a large, pointed fin on the shark's back that helps them maintain stability and steer through the water. It's an important feature that distinguishes sharks from other fish.
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What is the relationship between a mutation and a gene?
Answer:
For me its B
Explanation:
The plant Arabidopsis Thaliana Has a gene which has been found to show an unusually high rate of mutation which conclusion is best supported by this observation?
A. The genus control by environment and not heredity
B. Traits associated with this gene may vary greatly in the species
C. Traits associated with this gene are beneficial to the species
D. The gene codes for flower color in the plant
Answer;
The correct answer would be option B.
Mutation refers to the random change in the nucleotide sequence of the DNA.
If a mutation occurs in a protein coding sequence of the DNA, it can result in the change of phenotype of a gene.
Thus, if a gene has a high mutation rate in a population, then the genetic variation for that gene must be high in a population.
The high genetic variation would result in high variation in the phenotype or trait associated with that gene.
when different tissues work together, they form a(n)
??
In the provided query, when different tissues work together, they form an organ.
Tissue is defined as a group of cells that have similar structure and functions.
An organ was a collection of tissues that work together to perform a specific function. For example, the heart is an organ that is made up of muscle tissue, connective tissue, and nervous tissue.
Organs are part of larger systems present in the body, such as the circulatory system, respiratory system, and digestive system. These systems are made up of multiple organs that work together to keep the body functioning properly.
Therefore, organ is formed when different tissues are working together.
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ahh pls help assappp
photosynthesis turns __________ into _________ energy.
Explain how Seafood Watch promotes environmentally responsible fishing practices.
Answer:
Seafood Watch identifies seafood that has been harvested in a sustainable manner and promotes this seafood over varieties that were not sustainably harvested. The idea is that only the fishermen utilizing sustainable practices are rewarded financially and will therefore out compete their competitors.
Explanation:
This type of water has a very low salt content when compared to the ocean.
Answer:
Freshwater
Explanation:
Freshwater is usually defined as those water bodies that are comprised of relatively very less amount of salt content. This includes rivers, lakes, and ponds. The amount of salt present in these water bodies is less than 1%, thereby providing the water on which the living beings are dependent on. It is comprised of less than 500 ppm of dissolved salts. These water bodies support a large number of aquatic animals.
Whereas, the ocean water body is comprised of high salinity.
Thus, the freshwater bodies contain low very salinity compared to the ocean water body.
If you visited a savanna you would most likely see
If you visited a savanna, you would most likely see vast grasslands with scattered trees or shrubs.
Savannas are tropical or subtropical ecosystems characterized by a mix of grasses and scattered vegetation. They are often found in regions with a pronounced dry and wet season. One of the distinctive features of savannas is the presence of herbivores such as zebras, wildebeest, giraffes, and antelopes, which graze on the grasses.
These herbivores, in turn, attract predators like lions, cheetahs, hyenas, and leopards, which can often be observed hunting and feeding on the herbivores. Other common wildlife in savannas includes elephants, buffalo, and various bird species. The open landscape and diverse animal life make savannas popular destinations for wildlife safaris and nature enthusiasts.
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Ill give brainliest
Select all that apply.
Aimee is flying from San Francisco, CA to New York, NY. Which layers of the atmosphere will she fly through?
troposphere
stratosphere
ionosphere
mesosphere
Answer: troposphere and stratosphere
Explanation: i got this right on my class since this is a multiple choice question.have a great day.=D
Our solar system is located very close to the center of the Milky Way galaxy, outside of the spiraling arms.
True or False
Answer,
False
Hope This Helps :-)
Answer:
False
Explanation:
We are in a arm that is small. We also are not super close to the center
Which of these are the correct base pairs in DNA?
adenine and uracil
cytosine and guanine
cytosine and adenine
thymine and guanine
a sandwich is made up of ham, lettuce,tomato, bread, and butter. describe two marcrimolecules cantined in the sandwich and effect on human body?
Which of the following diseases can cause paralysis?
polio
yellow fever
Rocky Mountain spotted fever
rabies
chicken pox
Among the diseases listed, polio, rabies, and Rocky Mountain spotted fever can cause paralysis.
- Polio is known for causing muscle weakness and paralysis, which can sometimes be permanent.
- Rabies, if left untreated, can lead to paralysis as the virus attacks the nervous system.
- Rocky Mountain spotted fever, a bacterial infection transmitted by ticks, can lead to neurological symptoms including paralysis in severe cases.
The incorrect options are:
Yellow fever: Yellow fever is a viral hemorrhagic fever caused by the yellow fever virus, primarily transmitted by mosquitoes. While yellow fever can cause various symptoms such as fever, headache, jaundice (yellowing of the skin and eyes), and even liver damage, it typically does not lead to paralysis.
Chickenpox: Chickenpox is a highly contagious viral infection caused by the varicella-zoster virus. While chickenpox can cause discomfort and itching due to its characteristic rash of itchy blisters, it does not typically lead to paralysis.
What is a Winter Storm Watch?
what is the probability of these two parents having Color Blind Son?
one reason that electric power plants do not send out electrical energy as a direct current is that direct current can not be transformed explain why
This is because direct power has no pulsation (waveform characteristic) that is significant in electromagnetic induction. The gradual increase and decrease of power, at a given frequency, in indirect power is significant in electromagnetic induction. This enables transformers to induce electricity into the secondary coil, from the primary coil, at the core of the transformer.Transformers transform electric power by increasing or decreasing the voltage and current of electricity.
In what process are cells with half the number of DNA strands are produced.