If a male bird that is heterozygous for a recessive Z-linked mutation is crossed to a wild-type female, what proportion of the progeny will be mutant males?
A. 50%
B. 75%
C. 0%
D. 100%
E. 25%
Ans: C. 0%
You might also like to view...
Organisms capable of nitrogen fixation
(a) include some bacteria. (b) include some cyanobacteria. (c) may live as symbionts with other organisms. (d) all of the above.
What happens to the glucose molecule during glycolysis?
a. It is converted to acetyl CoA. b. It is converted to CO 2 . c. It is converted to two pyruvate molecules. d. It is converted to water.
The type of plant cell that provides support without interfering with growth and is similar to "strings in celery" is a cell.
A. sieve tube B. collenchyma C. guard D. sclerenchyma E. parenchyma
The major structural elements of the cytoskeleton are
A) the extracellular matrix and the cell wall. B) microtubules, microfilaments, and intermediate filaments. C) the cytoplasm and cytosol. D) cleavage furrows and G-actin. E) proteoglycans and cellulose microfibrils.