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प्रश्न
When two sickle-cell carriers (HbA HbS) are crossed, what is the expected genotypic ratio of offspring?
विकल्प
3 HbA HbA : 1 HbA HbS
1 HbA HbA : 3 HbA HbS : 1 HbS HbS
1 HbA HbA : 2 HbA HbS : 1 HbS HbS
1 HbA HbA : 1 HbA HbS : 2 HbS HbS
MCQ
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उत्तर
A cross between two heterozygous carriers (HbA HbS × HbA HbS) produces the typical Mendelian monohybrid ratio: 1 HbA HbA : 2 HbA HbS : 1 HbS HbS. The one-quarter homozygous normal, one-half heterozygous carrier, and one-quarter homozygous mutant offspring distribution reflects standard segregation of alleles during meiosis.
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