LIFE SCIENCE

OBJECTIVE LIFE SCIENCE

GENETICS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Hemophilia is a sex-linked recessive trait found on the x chromosome. Complete a cross between a woman who is a carrier and a man who is normal.What are the chances, if they have a daughter, that she is a carrier?
A
100%
B
75%
C
50%
D
25%
Explanation: 

Detailed explanation-1: -A) What is the probability that a daughter of this mating with be a hemophiliac? The probability that a daughter of this mating with be a hemophiliac is zero. Although, there is a 50% chance that a daghter will be a carrier.

Detailed explanation-2: -Hemophilia A and hemophilia B are inherited in an X-linked recessive pattern . The genes associated with these conditions are located on the X chromosome, which is one of the two sex chromosomes . In males (who have only one X chromosome), one altered copy of the gene in each cell is sufficient to cause the condition.

Detailed explanation-3: -An X-linked recessive means that a female requires mutated genes on both X chromosomes, while a male requires only one mutated gene located on the X chromosome. So, women can be both carriers and affected.

There is 1 question to complete.