(A) Polydactyly is a condition where an individual has extra fingers or toes.It is a genetic disorder inherited in an autosomal dominant pattern.This

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(A) Polydactyly is a condition where an individual has extra fingers or toes.It is a genetic disorder inherited in an autosomal dominant pattern.This means that only one copy of the mutated gene from either parent is sufficient to cause the condition.Therefore,the correct option is $A$.

Class 12 Biology Principles of Inheritance and Variation Pedigree Analysis and Mendelian disorders

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Polydactyly in humans is caused by a/an:

A
Autosomal dominant gene
B
Autosomal recessive gene
C
Sex-linked dominant gene
D
Sex-linked recessive gene

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Principles of Inheritance and Variation

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Pedigree Analysis and Mendelian disorders

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Polydactyly in humans is caused by a/an:

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Phenylketonuria is an inborn error of metabolism that is inherited as:

$A$ normal woman,whose father was colour-blind,is married to a normal man. The sons would be

$A$: The heterozygotic female for haemophilia may transmit the disease to sons.$R$: Such traits show criss-cross inheritance.

When a hemophilic male $(X^h Y)$ marries a carrier female $(X^H X^h)$ for hemophilia,what are the chances of all daughters born being normal (in $\%$)?

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$A$: The heterozygotic female for haemophilia may transmit the disease to sons.
$R$: Such traits show criss-cross inheritance.