MCQ
Which one is diploid
- ASpermatid
- ✓Primary spermatocytes
- CSecondary spermatocytes
- DSpermatozoa
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$I$. It is a transgenic variety of rice
$II$. It contains a goods quality of $\beta$-carotene (provitamin-A)
$III$. $\beta$-carotene is a principal source of vitamin- $A$
$IV$. The grains of the rice are yellow in colour due to $\beta$-carotene. The rice is commonly called golden rice
Which of the statements given above are correct?
Reason : Sex in humans is a polygenic trait depending upon a cumulative effect of some genes on $X-$ chromosome and some on $Y-$ chromosome.