Question

When a woman gives birth to twins, a boy and a girl, it is likely that two ova in the mother’s fallopian tube were fertilized by two sperms ……. A. each carrying an X chromosome. B. each carrying a Y chromosome. C. each carrying two Y chromosomes. D. carrying a Y and an X chromosome respectively.

Answer 1

Answer:

option D is the correct answer

Answer 2

Answer:

When a woman gives birth to twins, a boy and a girl, it is likely that two ova in the mother’s fallopian tube were fertilized by two sperms carrying a Y and an X chromosome respectively.

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