AP BIOLOGY

CELL DIVISION

MEIOSIS AND GENETIC VARIATION

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

Which of the following statements is correct about a man who has hemophilia and whose wife does not have the disease and who does not have any relatives with the disease?

A	All his daughters will have the disease.
B	All his sons will have the disease.
C	All his sons will be carriers.
D	All his daughters will be carriers.

Explanation:

Detailed explanation-1: -Final answer: The incorrect statement concerning haemophilia is it is a dominant disease.

Detailed explanation-2: -a 25% (one in four) chance of having a son with hemophilia. a 25% chance of having a son with normal blood clotting. a 25% chance of having a daughter who is a carrier. a 25% chance of having a daughter who has hemophilia.

Detailed explanation-3: -This means that males only have one copy of most of the genes on the X chromosome, whereas females have 2 copies. Thus, males can have a disease like hemophilia if they inherit an affected X chromosome that has a mutation in either the factor VIII or factor IX gene.

Detailed explanation-4: -What is the Important Symptom of Hemophilia? Answer: The Correct answer is bleeding. The main sign of haemophilia is bleeding, which occurs when the blood does not clot properly.

There is 1 question to complete.