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

A Autosomal recessive
B \(X\)-linked dominant
C Autosomal dominant
D \(X\)-linked recessive

Verified Solution

Answer & Solution

Correct Answer

(A) Autosomal recessive

Step-by-step Solution

Detailed explanation

(a) : Autosomal recessive traits are the traits which are caused by recessive autosomal genes when present in homozygous condition. The given pedigree can be explained as:As the trait appears only in homozygous recessive individuals \((aa)\), therefore it is an autosomal recessive trait.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

Same subject

Match the following columns and select the correct option

Column \(I\)	Column \(II\)
(\(a\)) Ovary	(\(i\)) Human chorionic Gonadotropin
(\(b\)) Placenta	(\(ii\)) Estrogen and Progesterone
(\(c\)) Corpus Iuteum	(\(iii\)) Androgens
(\(d\))Leydig cells	(\(iv\))Progesterone only

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