MCQ
Which one of the following is an example of polygenic inheritance?
- AFlower colour in Mirabilis jalapa
- BProduction of male honey bee
- CPod shape in garden pea
- DSkin colour in humans
Explanation:
Polygenic inheritance occurs when one character is controlled by two or more genes.Often the genes are large in quantity but small in effect. Examples of human polygenic inheritance are height, skin colour, eye colour and weight.
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$I.$ very long molecule
$II.$ double-stranded
$III. DNA$ or $RNA$
$IV$. complementary to a part of desired gene
The correct pair is
| Method | Mode of Action |
| $(A)$ The pill | $(i)$ Prevents spermsreaching cervix |
| $(B)$ Condom | $(ii)$ Prevents implantation |
| $(C)$ Vasectomy | $(iii)$ Prevents ovulation |
| $(D)$ Copper $T$ | $(iv)$ Semen contains no sperms |
$[Image]$
Type $I$ Type $II$ Type $III$
