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Reproduction in Organisms
Which of the following is not true for inbreeding?
It causes inbreeding depression after a few generations
It always increases the productivity.
It is used to produce a pure line.
It leads to homozygosity
B.
It always increases the productivity.
Inbreeding leads to increase in homozygosity. In recessive alleles, it may cause expression of harmful effects. It may also lead to loss of fitness in progenies, thus decrease productivity in some cases.
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Assertion: A middle aged woman is reported to have small breasts and undersized uterus.
Reason: Her genotypic analysis shows XO condition of allosomes.
Which of the following statements is correct ?
1. Common cold- Droplet Infection.
2. Typhoid - Contaminated food & water.
3. AIDS- Shaking hands.
4. Ringworm - Using infected towels.
Which of the following statements is correct
Which of the following is a cloning vector?
Starting from the maximum, arrange the following male reproductive accessory organs in the correct order, based on the amount of secretion poured into urethra.
(i) Prostrate gland
(ii) Seminal vesicle
(iii) Bulbourethral gland
Which of the following contraceptive devices make uterus unsuitable for implantation?
Sexual stage (gametocytes) of Plasmodium occurs in
Sporopollenin is a constituent of pollen exine. It can be degraded by the action of
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