A man and woman are each heterozygous for the autosomal recessive gene for albinism. They already have two nonalbino
children and want to have two more. What is the probability that their next two children will be phenotypically
identical to each other with regard to skin color (i.e., either both albinoor neither albino)?
a. 1/16
b. 3/16
c. 4/16
d. 9/16
e. 10/16
ANSWER: e
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A. They both use ATP energy. B. They both move cargo to the plus end of a cytoskeletal filament. C. They both move along microtubules. D. None of the above statements are false.
In what ways do human X and Y chromosomes differ from one another?
A. The X chromosome is larger than the Y. B. The X chromosome has about 1,000 genes and the Y has only about 50. C. The X chromosome is found only in females, while the Y is found only in males. D. The X and Y chromosomes differ both in size and in number of genes. E. The X and Y chromosomes have no regions in common and do not pair during meiosis.
Which proteins would you target if you wanted to disrupt the chromosome superstructure for chromatin condensation that ultimately produces the characteristic shape of the metaphase chromosome?
What will be an ideal response?
In humans, the term embryo refers to the following period of time: ____.
A. from the ninth week after fertilization until birth B. from the eighth week after fertilization until birth C. from fertilization until the ninth week after fertilization D. from 2 to 10 weeks after fertilization E. from 2 to 8 weeks after fertilization