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प्रश्न
Can a child have blood group O if his parents have blood group ‘A’ and ‘B’. Explain.
उत्तर १
If parents are heterozygous then child can have O blood group but if parents are homozygous then child cannot have O blood group.
उत्तर २
Yes, a child with blood groups A and B can have blood group O.
If one parent's genotype is IAIo and the other parent's genotype is 1B 1o, then gametes from the parents can have either of the genotypes, i.e. IA, 1B or Io.
If fertilisation occurs only between gametes with Io, the child's genotype will be IoIo, and the child will have blood group O.
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संबंधित प्रश्न
Which one of the following is an example of multiple alleles?
(a) Height in pea plant
(b) Hair colour in cattle
(c) Petal colour in four o'clock plant
(d) Wing-size in Drosophila
The cross between two parents having one pair of contrasting characters
Which one of the following is the phenotypic monohybrid ratio in F2 generation?
Define the following:
Heterozygous
Define the following:
Recessive
Explain the statement of Law of dominance is not universal.
Which of the following are reasons for Mendel’s success?
- Usage of pure lines or pure breeding varieties
- Consideration of one character at a time
- Maintenance of statistical records of experiments
- Knowledge of linkage and incomplete dominance
Two pea plants one with round green seeds (RRyy) and another with wrinkled yellow (rrYY) seeds produce F1 progeny that have round, yellow (RrYy) seeds. When F1 plants are selfed, the F2 progeny will have new combination of characters. Choose the new combination from the following
- Round, yellow
- Round, green
- Wrinkled, yellow
- Wrinkled, green
How many pairs of contrasting characters in pea bad were chosen by Mendel?
