Crossing over occurs during
A) prophase I.
B) metaphase I.
C) prophase II.
D) metaphase II.
Correct Answer:
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Q20: The number of sperm cells in an
Q21: After the second meiotic division,the number of
Q22: A normal oogonium is a(n)_ cell.
A)diploid
B)aneuploid
C)polyploid
D)triploid
Q23: Meiosis in females
A)is completed only if an
Q24: Human prenatal development takes _ weeks.
A)32
B)38
C)44
D)52
Q26: _ prepares sperm for penetration of the
Q27: By the end of meiosis I of
Q28: Primary spermatocytes develop from the division of
A)male
Q29: The nuclei from the approaching sperm and
Q30: Fertilization usually occurs in the
A)ovary.
B)uterine tube.
C)uterus.
D)endometrium (uterine
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