If the number of chromosomes in most body cells of a mammal is $40$, the cells in the seminiferous tubule will have
If the number of chromosomes in most body cells of a mammal is $40$, the cells in the seminiferous tubule will have
- A
$40$ chromosomes
- B
$20$ chromosomes
- C
$10$ chromosomes
- D
While some other will have $20$
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Assertion : Phenylketonuria is a recessive hereditary disease caused by body’s failure to oxidize an amino acid phenylalanine to tyrosine, because of a defective enzyme.
Reason : It results in the presence of phenylalanine acid in urine.
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