At the end of gastrulation, what is produced?
a. a blastocyst
b. germ layers
c. solid balls of cells
d. a neural tube
e. apoptosis
b
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A fetus is
(a) a newborn pig. (b) a newborn human. (c) an unborn mammal. (d) all of the above.
In seed plants, the transfer of immature male gametophytes to female reproductive parts is a process called ____
a. meiosis b. pollination c. fertilization d. mitosis e. sporulation
If a pedigree of several generations shows only females affected by a particular trait, what can be ruled
out? A. Autosomal recessive inheritance D. X-linked recessive inheritance B. X-linked dominant inheritance E. None of these can be ruled out C. Y-linked inheritance
Suppose a person is a carrier for a genetic disorder. Which of the following phrases about this person is true?
A.) will develop the disorder only late in life B.) cannot pass the disorder to sons, just daughters C.) the allele is not passed on due to Y chromosome inactivation D.) does not have the disorder but can pass it on