Unit 18: Inheritance — Mcqs

Q1.1.In the monohybrid cross of Mendel, when a pure round-seeded plant was crossed with a wrinkled-seeded plant, all the F1 progeny were round-seeded, because of:

Q1.2.In a cross of AaBb x AaBb, what fraction of the offspring can be expected to express one of the two dominant alleles, but not both?

Q1.3.In which of these cases, two genes can experience independent assortment?

Q1.4.The blood group AB may be given to a person who has blood group;

Q1.5.If father has blood group B and the mother has blood group A, what blood groups their children have?

Q1.6.A gene for corn has two alleles, one for yellow kernels and one for white kernels. Cross pollination of yellow corn and white corn results in ears with approximately equal number of yellow and white kernels. Which term best describes the relationship between the two alleles?

Q1.7.A cross between two plants with genotypes AaBb and AaBb results in an F1 generation that is 25% AABB, 50% AaBb, and 25% aabb. Which reason most likely explains why other possible genotypes are not present?

Q1.8.In pea plants, the allele for tall stalks (T) is dominant over the allele for short stalks (t). Suppose a cross between a tall pea plant and a short pea plant produces 43 tall offspring and 47 short offspring. If one of the tall offspring is crossed with one of the short offspring, what ratio of genotypes would be most likely in their offspring?

Q1.9.Allele B produces black coat colour while b produces white coat colour. Allele C produces curly fur while c produces straight fur. In a cross between two BbCc parents, predict the fraction of offspring with black coat colour and straight fur.

Q1.10.What is the criterion to mark an allele as dominant?

Q1.11.Which of these characters is controlled by a multiple allelic system?

Q1.12.Albinism is caused by a recessive gene. A woman with albino father marries an albino man. What will be the proportion of her progeny?

Q1.13.When the activity of one gene is suppressed by the activity of a non-allelic gene, it is known as;

Q1.14.Which of the following is a result of Erythroblastosis fetalis?

Q1.15.Colour blindness is more common in males because it is a/an;