NEET BIOLOGY

GENETICS AND EVOLUTION

GENETIC BASIS OF INHERITANCE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The inheritance pattern of hemophilia is
A
autosomal dominant
B
autosomal recessive
C
sex-linked dominant
D
sex-linked recessive
Explanation: 

Detailed explanation-1: -Hemophilia is a sex-linked recessive disorder. The abnormal gene responsible for hemophilia is carried on the X chromosome. Males have one X chromosome and one Y chromosome.

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: -The disorder may be caused by several genetic mutations in the F11 gene, which provides instructions for making FXI. Hemophilia C is usually inherited in an autosomal recessive pattern, meaning that a person must have two mutated copies of the gene-one from each biological parent-to develop the condition.

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