Embryonic stem cells are harvested from the inner cell mass of an early stage embryo called a(n)
____________________. Fill in the blank(s) with the appropriate word(s).
blastocyst
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Which is the normal start codon for protein synthesis?
a. AUG b. UAA c. UAG d. UGA e. GGU
The part of the Drosophila zygote with high bicoid concentration will
A. become the anterior region of the embryo. B. become the segments that will have legs. C. become the segment that will have wings. D. become the region of the embryo that has a spiracle. E. become the tail region of the embryo.
P, D, and Q are three genes found on a single chromosome in greyhounds. The recombination frequencies between the three genes are shown below. In which order are these genes found on the greyhound chromosome?P-D = 50% P-Q = 20% D-Q = 30%
A. P-Q-D B. Q-D-P C. D-P-Q D. P-D-Q E. It is impossible to determine.
Why do X-linked conditions appear more frequently in males than in females?
A) Males are more likely to inherit an extra chromosome than females. B) A male with a nonfunctioning allele on the X chromosome does not have another allele of that gene on the Y chromosome that could cover up the nonfunctioning one. C) The Y chromosome carries many alleles that are recessive to alleles on the X chromosome. D) Males have no X chromosomes. E) Females have no X chromosomes.