Genetics-Principles of Inheritance MCQs


Question #1: HbA and HbS alleles of normal and sickle cell haemoglobin are

Question #2: Which of the following changes to a DNA molecule is least likely to result in a deleterious mutation?

Question #3: Sometimes chromosome number increases or decreases due to

Question #4: Which one of the following conditions in humans is correctly matched with its chromosomal abnormality/linkage?

Question #5: The polygenic genes show

Question #6: Sickle cell anaemia is due to substitution in which

Question #7: In pea plants, the long-stem trait (L) is dominant and the short-stem trait is recessive. Two pea plants were crossed, producing seeds that yielded 165 long-stem plants and 54 short-stem plants. The genotypes of the parent plants were most likely

Question #8: If gene frequency between genes a and c is 2%, b and c is 13%, a and b 15%, c and d 17% and a and d 19% , what will be the sequence of these genes in a chromosome

Question #9: Multiple alleles occur on:

Question #10: A haemophilic male marries a normal woman, whose father is also a haemophilic. It is expected that

Question #11: Which one of the following individuals can 16 different gametes?

Question #12: If you cross a diploid individual that is homozygous recessive for a given trait with a heterozygous diploid individual, what is the probability of obtaining with the homozygous recessive phenotype?

Question #13: Which one of the following crosses show 3 : 1 ratio?

Question #14: A cross between a plant having genotype AaBb × aabb do not yield a ratio of 1 : 1: 1 : 1. What can we say?

Question #15: A man with blood group A marries a woman having blood group AB. Which of the following blood group in the progeny of this couple would show that the man is heterozygous?

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