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Parents are heterozygous albino. What will be the first three children?
  • a)
    Some normal, heterozygous and albino
  • b)
    All normal
  • c)
    All heterozygous and albino
  • d)
    No normal
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
Parents are heterozygous albino. What will be the first three children...
Albinism is an autosomal recessive disorder which means that only homozygous recessive genotype will show the disorder. The heterozygous genotype will be normal but will serve as a carrier since the recessive gene is masked by the presence of the normal dominant gene. According to the question, both parents are a carrier (heterozygous normal).
Parent generation: Aa (carrier mother) X  Aa (carrier father)
Gametes :
Aa 


A          a
AAA
(normal child)
       Aa
       (normal carrier child)
aAa
(normal carrier child)
       aa
       (albino child)
F
 generation = 1 normal child: 2 normal carrier child: 1 albino. Hence, the first three children can be normal, heterozygous and albino; option A is the correct answer.
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Parents are heterozygous albino. What will be the first three children?a)Some normal, heterozygous and albinob)All normalc)All heterozygous and albinod)No normalCorrect answer is option 'A'. Can you explain this answer?
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