Principles of Inheritance and Variation questions
1199 published questions with worked solutions.
- Two plants, one with black flowers and the other with white-coloured flowers, were crossed in an experiment. In the next...
- A man of blood group B marries a woman of blood group AB. Which type of progeny indicates that the man is heterozygous?
- In a dihybrid cross between two heterozygotes, AaBb AaBb, if we get a 3:1 ratio among the offspring, the reason for this may be
- Which of the following characteristics represent the 'inheritance of blood groups' in humans? (i) Dominance (ii) Co-dominance...
- What map unit (centimorgan) is adopted in the construction of genetic maps?
- A woman has an X-linked condition on one of her X chromosomes. This chromosome can be inherited by
- Name the syndrome which is caused when there is trisomy of the sex chromosomes.
- Statement 1 (Assertion): Mendel conducted artificial pollination experiments for his genetic studies using true-breeding pea...
- Statement 1 (Assertion): At the F2 stage in a monohybrid cross, both parental traits are expressed in the proportion 3:1....
- Statement 1 (Assertion): A test cross is the cross between the F1 progeny and either of the parent types. Statement 2 (Reason): A...
- Statement 1 (Assertion): Pink-coloured flowers appear in the F1 generation of the plant *Mirabilis jalapa*. Statement 2 (Reason):...
- Statement 1 (Assertion): Pairing and separation of a pair of chromosomes would lead to segregation of the pair of factors they...
- Statement 1 (Assertion): The law of independent assortment can be studied by means of a dihybrid cross. Statement 2 (Reason): The...
- Statement 1 (Assertion): When yellow-bodied, white-eyed *Drosophila* females were hybridized with brown-bodied, red-eyed males,...
- Statement 1 (Assertion): The maximum frequency of recombination that can result from crossing over between linked genes is 50...
- Statement 1 (Assertion): In pigeons, females are heterogametic and males are homogametic. Statement 2 (Reason): In pigeons,...
- Statement 1 (Assertion): In honeybees, drones have 16 chromosomes while the queen has 32 chromosomes. Statement 2 (Reason): Male...
- Statement 1 (Assertion): Human skin colour is controlled by 3 pairs of genes. Statement 2 (Reason): Skin colour in humans shows...
- Statement 1 (Assertion): Sickle-cell anaemia is an autosome-linked recessive disorder that can be transmitted if both parents are...
- Statement 1 (Assertion): Turner's syndrome is caused due to the absence of any one of the X and Y sex chromosomes. Statement 2...
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