STD 11 - 4. Animal kingdom — NEET STD 11 Science — Question

$(I)$ Gene flow ;

$(II)$ Genetic drift

$(III)$ Mutation

$(IV)$ Genetic recombination

$(V)$ Natural selection

The correct combination is

$B:$ It act as intercellular messengers and are produced in large amount

$(1)$ Haemophilia is a sex­linked recessive disease.

$(2)$ Down’s syndrome is due to aneuploidy.

$(3)$ Phenylketonuria is an autosomal recessive gene disorder.

$(4)$ Sickle cell anaemia is an $X$-­linked recessive gene disorder.

$I.$ Abnormal development

$II.$ Father

$III.$ Mother

$IV.$ Autosomes