Biology

Why is freckles not X linked dominant trait
1 Answer
In a certain species of plant, flowers occur in three colors: blue, pink, and white. A pure-breeding pink plant is mated with a pure-breeding white plant. All of the F1 are blue. When the blue F1 plants are selfed, the F2 occurs in the ratio 9 blue:3 pink:4 whitE. How many gene pairs control the flower color phenotype?
2 Answers
Mitosis and meiosis 1 comparison of all phases
1 Answer
A single newt is part of all the newts in a pond. The pond contains many more organisms as well as abiotic factors. The pond is part of a bigger picture, an ecosystem. Which term BEST describes all the newts in a pond?A)communityB)individualC)populationD)species
2 Answers
A______________is a type of cell that receives and transmits information in the Central Nervous System(CNS brain and spinal cord) and the Peripheral Nervous System (PNS afferent & efferent nerves).
1 Answer
SMC (structural maintenance of chromosomes) proteins are associated with chromatin in many types of organisms. Two of the major complexes that eukaryotes possess are cohesins and condensins. Sort the following phrases as describing cohesins, condensins, or both. Note: If you answer any part of this question incorrectly, a single red X will appear indicating that one or more of the phrases are sorted incorrectly. 1) generally dimeric, forming a V-shaped complex 2) hold sister chromatids together after replication, until chromatid separation 3) each terminus contains part of a site for ATP hydrolysis 4) contain two coiled-coil motifs connected by a hinge domain 5) associated with kleisin 6) essential for DNA replication and cell division 7) contributes to the compaction of chromosomes during mitosis and enables proper chromatid separation during anaphase
2 Answers
Sequence the levels of organization in multicellular organisms
2 Answers
Tony Loves to swim everyday what is Tony a noun verb adjective subject
2 Answers
the character having curly hair is dominant and straight hair is recessive ,why?
1 Answer
The mitochondria within eukaryotic cells have their own genomes. Imagine that a mutation arises on the mitochondrial genome and, at the time of cytokinesis of the host cell, 10% of the mitochondria in that cell have that mutation. In the two daughter cells, what percentage of the mitochondria will possess that mutation? A. Although the cytoplasm containing the mitochondria will be equally divided between the two cells, there is no precise mechanism for ensuring that the organelles are equally divided.B. One cannot accurately predict what the percentages will be in each cell.C. 50% eachD. A and B onlyE. None of the above
2 Answers
Two European men and two Polynesian women settled on a previously uninhabited tropical island. All four of the settlers have brown eyes, a dominant trait, but one of the Europeans is heterozygous and carries the recessive gene for blue eyes.No new settlers arrive,and nobody leaves the island.After a few generations,the percentage of blue-eyed individuals increases from the original zero to 25 percent.This is probably due to which of the following factors?A) genetic driftB) mutationC) gene flow
2 Answers
Which virus has a structure that includes an outer lipid bi layer that is studded with proteins?
1 Answer
The Earth is about 4.6 billion years old. However, the oldest sea floor is only about 180 million years old. What do you think is the reason for this? (Hint: Remember that new seafloor is constantly being created, but the Earth is not getting bigger with time.)
2 Answers
What is a possible eDuring exercise, sensory receptors detect changes in oxygen and carbon dioxide levels in the blood. This information is then sent to the brain's medulla, which causes the heart to beat faster and increases the rate of breathing. Exercising also causes the nervous system to signal the pancreas and thyroid gland to release hormones which regulate metabolism.Which statement is best demonstrated by this scenario?ffect of leakage of inner ear fluid?
2 Answers
Could the way you perform the procedure affect the outcome? If the outcome changes, does it mean the net rate of photosynthesis has changed?
1 Answer
Which statement best explains how exposition helps a playwright develop social issues in a play?
2 Answers
Which statement best explains why organisms of the same species that become isolated eventually become different fromeach other over time?Their DNA mutates.They are exposed to different environments.They both find ways to survive.They do not have any of the same genes.
2 Answers
describe what each type of survivorship show ( type1, type2 ,and type3)
2 Answers
Ribosomes are found: Select one: a. on smooth endoplasmic reticulum b. on the rough endoplasmic reticulum c. in the cytoplasm d. in the cytoplasm and on the rough endoplasmic reticulum e. on the Golgi apparatus
1 Answer
How does the cell theory demonstrate this definition of theory
1 Answer
Gibson Assembly Several enzymes are present in the Gibson assembly reaction. For each of the following enzymes, define the role of the enzyme at room temperature (when the reaction is set up) and at 50 C (the temperature for the 30 minute incubation after set up). a. Phusion DNA polymerase , b. T5 exonuclease , c. Taq DNA ligase
1 Answer
What effect does the smoke have on the pH of water?
2 Answers
What theory of hearing contends that the perception of a sound's frequency depends on how often the auditory nerve fires?
2 Answers
What sequence of bases would pair with GTACG?
2 Answers