MCQ
Oogenesis comprises
- AMultiplication phase
- BGrowth phase
- CMaturation phase
- ✓All the above
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| Column - $I$ | Column - $II$ |
| $(a)$ Herbivores-Plants | $(i)$ Commensalism |
| $(b)$ Mycorrhiza-Plants | $(ii)$ Mutualism |
| $(c)$ Sheep-Cattle | $(iii)$ Predation |
| $(d)$ Orchid-Tree | $(iv)$ Competition |
| Column $-I$ | Column $-II$ |
| $a.$ Solid symbol | $(i)$ Carrier of sex linked trait |
| $b.$ Horizontal line between symbols | $(ii)$ Offspring |
| $c.$ Horizontal line above the symbols | $(iii)$ Trait to be studied |
| $d.$ Dot in centre | $(iv)$ Parents |
Reason : Sex in humans is a polygenic trait depending upon a cumulative effect of some genes on $X-$ chromosome and some on $Y-$ chromosome.
| Column-I Methods | Column-II Working Methods |
| P. M.T.P. | i. Analysis of foetal cells in amniotic fluid |
| Q. Amniocentesis | ii. Legal acceptance in 1971 |
| R. SAHELI | iii. Program launched in 1951 |
| S. Family planning | iv. Nonsteroidal oral contraceptive |