$A$ : Occasionally mammary glands are functional in males and the condition is called gynaecomastia.
$R$ : Decreased testosterone in later life may also lead to gynaecomastia. It is usually due to perturbation of estrogen to androgen ratio.
Assertion and Reason both are correct and also correct explanation.
Assertion and Reason both are correct but not explanation of assertion.
Assertion is correct, but Reason is incorrect.
Both Assertion and Reason are incorrect.
When a segment of a chromosome breaks and later rejoins after $180^{\circ}$ rotation,it is known as
Animal which remains male initially, then changes to female $(Tapeworm\, proglottides)$ is called
When heterozygous tall plants are self-pollinated than tall and dwarf plants are obtained, this is explain to
The most common type of haemophilia results from the congenital absence of
A tobacco plant which is heterozygous for albinism $(a\, recessive\,character)$ is self pollinated if $1200$ seeds are subsequently germinated, how many of the seedlings would have the parental genotype