MCQ
Primary sex organ in man is
- AScrotum
- BAccessory gland
- ✓Testis
- DUrinary bladder

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| $(a)$ Restriction endonuclease | $(i)$ Joins the $DNA$ fragements |
| $(b)$ Restriction exonuclease | $(ii)$ Extends primers on genomic $DNA$ template |
| $(c)$ $DNA$ ligase | $(iii)$ Cuts $DNA$ at specific position |
| $(d)$ Taq polymerase | $(iv)$ Removes nucleotides from the ends of $DNA$ |
Select the correct option from the following
Reason : Sex in humans is a polygenic trait depending upon a cumulative effect of some genes on $X-$ chromosome and some on $Y-$ chromosome.