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2007-10-28 08:20:16 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Biology
gametes carry half the number of normal chromosomes as a body cell. since we have 46 chromosomes or 23 pair ...the last 2 being the sex chromosomes, a sperm or an egg cariies only ONE sex chromosome so that after fertilization the developing zygote will have the normal somatic number of 46
2007-10-28 08:25:05 · answer #1 · answered by gungadin 4 · 0⤊ 0⤋
Two sex chromosomes in a healthy organism. Each gamete (egg+sperm) contributes one.
Note that there are chromosomal disorders where an individual will have two X chromosomes and a Y, or one X chromosome and 2 Ys, (I think 3 XXXs is not a viable organism in humans) so sometimes gametes will have 2 sex chromosomes, but this is abnormal.
2007-10-28 15:24:31 · answer #2 · answered by Mr. Quark 5 · 0⤊ 0⤋
Each egg or sperm has only one sex chromosome. The egg has only the X chromosome, and the sperm has either the X or the Y chromosome. It is the father who determine the sex of the child.
2007-10-28 15:25:19 · answer #3 · answered by OKIM IM 7 · 0⤊ 0⤋
human gamete has 1, either X or Y
zygote has 2, XX or XY
2007-10-28 23:41:19 · answer #4 · answered by Phuong_Minh 2 · 0⤊ 0⤋
One (normally).
2007-10-28 16:57:54 · answer #5 · answered by Anonymous · 0⤊ 0⤋
one, either x or Y
2007-10-28 15:24:27 · answer #6 · answered by J S 4 · 0⤊ 0⤋