Question

In the given human pedigree, the filled symbols represent the affected individual. Identify the type of given pedigree.

• A. X-linked recessive
• B. Autosomal dominant
• C. X-linked dominant
• D. Autosomal recessive

Answer 1

The correct option is D

Autosomal recessive

The correct option is D.

Explanation for the correct option:

1. In autosomal recessive, the disorder or disease is transmitted by two carrier parents.
2. This type of disease doesn't depend on the gender of the affected person.

Explanation for the incorrect options:

Option A:

1. In this, the mutation is seen on the gene of X chromosomes and is transmitted when an affected mother or a mother with defected X- chromosome produces an offspring with a carrier father.
2. This type of disease is seen only in females.

Option B:

1. Autosomal dominant diseases are the disease that is carried by the autosomal chromosome.
2. If the abnormal gene is passed to the next generation the offspring is likely to get the disease.
3. In these cases one of the parents is normally affected by the disease.

Option C:

1. X- linked dominant disease can only be transmitted by the affected father.
2. They are due to the mutation on the X chromosomes.

Final answer: Autosomal recessive disease can be transmitted by the carrier parents and is not based on gender.