Drosophila (fruit flies) usually have long wings (+) but mutations in two different genes can result in bent wings (bt) or vestigial wings (vg). If a homozygous bent wing fly is mated with a homozygous vestigial wing fly, which of the following offspring would you expect?

A) All +bt +vg heterozygotes
B) 1/2 bent and 1/2 vestigial flies
C) All homozygous + flies
D) 3/4 bent to 1/4 vestigial ratio
E) 1/2 bent and vestigial to 1/2 normal


Ans: A) All +bt +vg heterozygotes

Biology & Microbiology

You might also like to view...

Which of the statements below represents the correct order of events in the adaptive immune response?

A. Antigen presentation, lymphocyte development, lymphocyte challenge, lymphocyte response B. Lymphocyte development, antigen presentation, lymphocyte challenge, lymphocyte response C. Antigen presentation, lymphocyte challenge, lymphocyte development, lymphocyte response D. Lymphocyte challenge, antigen presentation, lymphocyte development, lymphocyte response

Biology & Microbiology

If a gene is replaced with a heterologous sequence such that the gene is then nonfunctional, what is the result usually called?

What will be an ideal response?

Biology & Microbiology

Refer to Figure 44-2. Cell type__________ is/are primarily responsible for the release of histamine in

injured tissues and in allergic responses. a. A only b. B only c. C only d. D only e. A and cell type D

Biology & Microbiology

You make a knockout of a gene involved in neurological development, and find that the mice have malformed semicircular canals. Instead of being orthogonal (at right angles) to each other, they are parallel. What aberrant behavior might you see in these mice?

A. Low muscle tone B. Not startling to sudden noise C. Falling over D. Unable to respond to a call to locate another mouse E. Overeating

Biology & Microbiology