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प्रश्न
Why only left ovary and oviduct arc present in birds?
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उत्तर १
Only left ovary and oviduct are present in birds to reduce body weight and is an adaptation for flying.
उत्तर २
Only left ovary and oviduct are present in birds to reduce body weight and is an adaptation for flying.
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संबंधित प्रश्न
Define the term gene flow.
Define Population.
Match the following:
| Column- I | Column- II |
| 1. August Weismann | a. Mutation theory |
| 2. Hugo de vries | b. Germplasm theory |
| 3. Charl Darwin | c. Theory of acquired characters |
| 4. Lamark | d. Theory of natural selection |
The proportion of an allele in the gene pool to the total number of alleles at a given locus is called _______.
Match the columns and choose the correct option.
| Column I | Column II | ||
| i. | Zygote mortality | a. | Hybrid develops to maturity but becomes sterile |
| ii. | Hybrid sterility | b. | Egg is fertilized but zygote dies |
| iii. | Gamete mortality | c. | Union of two gametes does not occur in the iven time |
Hybrids develop to maturity but become sterile due to failure of proper gametogenesis. This is a post mating barrier called ____________.
Loss of gene from chromosome occurs due to ______
Black colored form became dominant over the light colored form in England during industrial revolution after 1845. This can be owed to ______.
Identify the method of reproductive isolation, when members of a population attain sexual maturity at different times preventing interbreeding.
What is Genetic recombination?
