Principles of Inheritance and Variation questions
1199 published questions with worked solutions.
- Mr. Kapoor has a Bb autosomal gene pair and a d allele that is sex-linked. What shall be the proportion of Bd in his sperms?
- Sex is determined in human beings
- Down's syndrome is due to
- The polygenic genes show
- If two persons with 'AB' blood group marry and have a sufficiently large number of children, these children could be classified...
- The colour blindness is more likely to occur in males than in females because
- In *Antirrhinum*, two plants with pink flowers were hybridized. The F1 plants produced red, pink and white flowers in the...
- Hemophilia is more common in males because it is a
- Two linked genes a and b show 20% recombination. The individuals of a dihybrid cross between ++/++ ab/ab shall show gametes
- Which one of the following conditions, though harmful in itself, is also a potential saviour from a mosquito-borne infectious...
- In Down's syndrome of a male child, the sex complement is
- Which one is a hereditary disease?
- The term "linkage" was coined by
- Albinism is known to be due to an autosomal recessive mutation. The first child of a couple with normal skin pigmentation was an...
- RR (Red) *Antirrhinum* is crossed with white (rr) one. Offspring Rr are pink. This is an example of
- In *Drosophila* the XXY condition leads to femaleness, whereas in human beings the same condition leads to Klinefelter's syndrome...
- A haemophilic man marries a normal woman. Their offspring will be
- Due to the cross between TTRr ttrr, the resultant progenies show what percent of tall, red-flowered plants?
- The genes controlling the seven pea characters studied by Mendel are now known to be located on how many different chromosomes?
- A woman with 47 chromosomes due to three copies of chromosome 21 is characterized by
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