Assume the parents of individual III-1 were both heterozygous. What is the probability that individual III-1 is homozygous dominant?

Which of the following statements are TRUE about meiosis I? Select all that apply.

A scientist studying Drosophila received three different mutants that all had tiny wings. When flies with the r1 mutation were crossed with flies with the r2 mutation, all offspring had tiny wings. When flies with the r2 mutation were crossed with flies with the r3 mutation, all offspring had wild-type wing size. What wing size would you expect if the scientist crossed flies with the r1 mutation with flies with the r3 mutation, and why?

A scientist studying Drosophila received three different mutants that all had tiny wings. When flies with the r1 mutation were crossed with flies with the r2 mutation, all offspring had tiny wings. When flies with the r1 mutation were crossed with flies with the r3 mutation, all offspring had tiny wings. What wing size would you expect if the scientist crossed flies with the r2 mutation with flies with the r3 mutation, and why?

_____ occurs when a chromosome segment breaks off and attaches to a different, nonhomologous chromosome.

_____ occurs when a chromosome segment is lost entirely.

The presence of an extra copy of a single chromosome is known as:

Which statement best explains why epistasis is not a form of dominance?

In mice, black fur (B) is dominant to brown fur, and short tails (T) are dominant to long tails. What proportion of the offspring from the following cross will have black fur and long tails? BbTt × Bbtt (uppercase B lowercase b uppercase T lowercase t crossed with uppercase B lowercase b lowercase t lowercase t)

In another species, individuals with one X chromosome show increased transcriptional activity from that X chromosome compared to the transcriptional activity of each X chromosome in individuals with two X chromosomes. Which dosage compensation mechanism is occurring?