Which statement is characteristic of reproduction in humans? 1)The reproductive cells of males and females differ in chromosome number. 2) Males and females produce gametes in the ovaries. 3)Males and females produce the same number of gametes. 4) The reproductive cycles of males and females are regulated by hormones.

only 1,3,4

Explanation:

1)The reproductive cells of males and females differ in chromosome number.

3)Males and females produce the same number of gametes.

4) The reproductive cycles of males and females are regulated by hormones.

Option C

Explanation:

A vaccine is usually given to boost up the immune system by making them familiar with the virus