In species that procreate via sexual reproduction, which of the following is true about the egg and sperm cells of the parents?
a. The egg cell and the sperm cell each contain 100% of the chromosomes of all other human cells.
b. The egg cell and the sperm cell each contain half of the chromosomes of all other human cells.
c. The egg cell and the sperm cell each contain "spare" chromosomes, in case there is damage to the original chromosomes.
d. The egg cell and sperm cell each contain 25% of the chromosomes of all other human cells, which is why every human trait takes exactly four chromosomes for full development.
Answer: B
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Jake is an only child. He often pretends to have an imaginary brother, "Jack," who plays with him. Jake's play shows
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