MCQ
In Drosophila the XXY constitution determines:
- AMaleness
- BFemaleness
- CIntersex
- DBoth A and C
Explanation:
In Drosophila, XXY leads to femaleness. Here, Y has no contributions in femaleness. Sex in Drosophila is determined by the ratio of sex chromosome (X) and autosomes.
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$Statement\; 2$: This requires not two children per couple but a little more effort on reduction of this number
$i.$ In transcription, adenosine pairs with uracil.
$ii.$ Regulation of lac operon by repressor is referred to as positive regulation.
$iii.$ The human genome has approximately $50,000\; genes.$
$iv. $ Haemophilia is a sex-linked recessive disease.
| Column $I$ | Column $II$ |
| $A$. Recombinant $DNA$ | $1$. Sea weeds |
| $B$. Gel electrophoresis | $2$. DNA staining |
| $C$. Ethidium bromide | $3$. Plasmid DNA that hasincorporated human DNA |
| $D$. Agarose | $4$. Process by which DNA fragments are separated based on their size |
$R$ - $LAB$ damages stomach.