During meiosis, gene pairs, such as Mm and Pp will assort independently and a ra

Question

During meiosis, gene pairs, such as Mm and Pp will assort independently and a random combination of genes can end up in the gametes. When the big M and little m segregate during meiosis, each is just as likely to end up in the same gamete as the big P or the little p.

Question 12 options:

Question 13 (2 points)

If there is 25% chance that a child will inherit a recessive disease from it parents, what is the probability that one of a couple's first three children will have the disease?

Question 13 options:

10%

25%

50%

75%

Question 14 (2 points)

On which of the sex chromosomes is a sex-linked gene usually carried?

Question 14 options:

13

15

18

Y

X

Question 15 (2 points)

Of the two X chromosomes inherited by human females, one becomes:

Question 15 options:

a mutant.

an allele.

inactivated.

an autosome.

an O chromosome.

Explanation / Answer

Question 12 Ans: True

Explanation: Yes, during the meiosis, gene pairs Mm and Pp will assort independently and a random combination of genes can end up in the gametes. The M and m can segregate independently during meiosis.

Question 13 Ans: 75%

Explanation: There is a 75% probability that one of a couple's first three children will have the disease. If there is 25% chance that a child will inherit a recessive disease from his parents.

Question 14 Ans: X

Explanation: The sex chromosomes is a sex-linked gene usually carried on the X chromosomes.

Question 15 Ans: inactivated.

Explanation: lf the two X chromosomes inherited by human females and the each one chromosome can become inactivated.

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