Principles of Inheritance and Variation questions
1199 published questions with worked solutions.
- Mongolian idiocy, due to trisomy of the 21st chromosome, is called
- The movement of a gene from one linkage group to another is called
- Sickle cell anaemia is induced by
- A test cross is carried out to
- A and B genes are linked. What shall be the genotype of the progeny in a cross between AB/ab and ab/ab?
- When a single gene influences more than one trait, it is called
- A human female with Turner's syndrome
- Down's syndrome is caused by an extra copy of chromosome number 21. What percentage of offspring produced by an affected mother...
- If a colour-blind man marries a woman who is homozygous for normal colour vision, the probability of their son being colour-blind...
- A woman with two genes for haemophilia and one gene for colour blindness, both present together on one of her 'X' chromosomes,...
- Which contributed to the success of Mendel?
- Which one of the following is an example of polygenic inheritance?
- A gene is said to be dominant if
- Blue eye colour is recessive to brown eye colour. A brown-eyed man whose mother was blue-eyed marries a blue-eyed woman. The...
- Both sickle-cell anaemia and Huntington's chorea are
- A family with five daughters only is expecting a sixth issue. The chance of it being a son is
- Two dominant non-allelic genes are 50 map units apart. The linkage is
- The first geneticist / father of genetics was
- A genetically diseased father (male) marries a normal female and the couple has 3 carrier girls and 5 normal sons. This may be...
- A colour-blind mother and normal father would have
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