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प्रश्न
Albinism is known to be due to an autosomal recessive mutation. The first child of a couple with normal skin pigmentation was an albino. What is the probability that their second child will also be an albino?
विकल्प
100%
25%
50%
75%
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उत्तर
25%
Explanation:
Since albinism is an autosomal recessive trait, the parents must both be heterozygous carriers (e.g., Aa) to have a child who is albino (aa). The cross between two carriers (Aa × Aa) yields a 25% chance of an albino offspring (aa), as the inheritance of each child is an independent event.
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संबंधित प्रश्न
Haploid plants are preferred over diploids for mutation study because in haploids ______.
Mutations result in
Match list I with list II.
| List I | List II | ||
| A. | A pair of chromosomes extra with diploid | i) | monosomy |
| B. | One chromosome extra to the diploid | ii) | tetrasomy |
| C. | One chromosome loses from diploid | iii) | trisomy |
| D. | Two individual chromosomes lose from diploid | iv) | double monosomy |
Who proposed the Mutation Theory of Evolution and in which year?
Which type of mutation shifts the reading frame of all downstream codons?
Which of the following is caused by intrinsic replication errors and tautomeric shifts?
Which physical mutagen works through ionizing radiation to break DNA strands?
What is an example of an alkylating agent that causes mutation?
Which human genetic condition is characterized by trisomy 21 and results from chromosomal mutation?
Which physical mutagens are classified as ionizing radiation?
