MCQ
Foetal sex can be determined by examining cells from amniotic fluid looking for:
- AAutosomes
- BChiasmata
- CSex chromosomes
- DKinetochores
Explanation:
Foetal sex can be determined by examining barr bodies.
Presence of barr bodies is an indication of X chromosome. Barr bodies are present in females only.
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| Column $- I$ | Column $- II$ |
| $(1)$ Grasses | $(P)$ Prevent autogamy and geitonogamy |
| $(2)$ Hydrilla | $(Q)$ Wind pollination |
| $(3)$ Cleistogamous flower | $(R)$ Water pollination |
| $(4)$ Papaya | $(S)$ Auto gamy |
$A$. The piece of $DNA$ would be able to multiply itself independently in the progeny cells of the organism.
$B$. It may get integrated into the genome of the recipient.
$C$. It may multiply and be inherited along with the host $DNA$.
$D$. The alien piece of DNA is not an integral part of chromosome.
$E$. It shows ability to replicate.
Choose the correct answer from the options given below:

| Column $- I$ | Column $- II$ |
| $(a)$ Organisms | $(i)$ Group of same species individuals |
| $(b)$ Populations | $(ii)$ Individuals |
| $(c)$ Communities | $(iii)$ Forest, desert, grassland |
| $(d)$ Biomes | $(iv)$ Group of many species |