Lesson: Chapter 20 — Heredity

20.5. Sex determination 3 of 6 Reset answers

Clear all your answers?

This erases every answer in this set and starts you again at question one. Your score will be gone.

Type these four numbers to confirm:

Those numbers don't match. Look at them again and type them.

Yes, clear Keep them

Question 3

Which sex chromosome does a human ovum carry?

A Always Y B Always X C Both X and Y D Either X or Y, in equal numbers

The right answer is the one marked above.

Always X. The mother is XX, so meiosis can only put an X into each ovum. She has no other kind to give.

It is the sperm that comes in two kinds. That single fact is the whole answer to the question of which parent determines the sex of the child.

Answer the question to continue.