What can be said about sex-determination in humans?

a. All human sperm carry a Y chromosome.
b. 25% of human zygotes are XY.
c. All zygotes carry a Y chromosome.
d. Sex depends upon which type of sperm fertilizes the egg.
e. All human eggs carry a Y chromosome.


ANSWER: d

Biology & Microbiology

You might also like to view...

How does the Black Queen Hypothesis explain the effect of gene deletions on bacterial evolution?

What will be an ideal response?

Biology & Microbiology

Which organism would you expect to find preserved as a fossil?

a. a jellyfish b. a shelled arthropod c. an earthworm d. a nematode e. a protistan such as an amoeba

Biology & Microbiology

what is HSV-I?

What will be an ideal response?

Biology & Microbiology

The swinging of a tennis racket is a brief, high-intensity activity that requires the contraction of ________ fibers

Fill in the blank(s) with correct word

Biology & Microbiology