Deviation from Mendelian Genetics
Deviation from Mendelian Genetics: Overview
This topic covers concepts such as Deviation from Mendelism, Incomplete Dominance, Codominance, Complementary Genes, Supplementary Genes, Dominant Epistasis, Pleiotropy, Polygenic Inheritance, Polyploidy, and Multiple Allelism.
Important Questions on Deviation from Mendelian Genetics
The fundamental cause of the sickle-cell disease is a change in the structure of:
A plant of Antirrhinum majus with red flowers was crossed with another plant of the same species with white flowers. The plants of the F1 generation bore pink flowers. The pattern of inheritance is exhibiting:
A woman with blood group O married a man with AB group. The possible genotype of their progeny would be:
A plant of Antirrhinum majus with red flowers was crossed with another plant of the same species with white flowers. The plants of the F1 generation bore pink flowers. The pattern of inheritance is exhibiting:
A child of blood group O cannot have parents of blood groups
The genotype of B-group father of an O-group child is:
When one gene controls two or more different characters simultaneously, the phenomenon is called
Gene which suppresses other gene’s activity but does not lie on the same locus is called as
Which one of the following pairs of features is an excellent example of polygenic inheritance?
Grain colour in wheat is determined by three pairs of polygene. Following the cross AABBCC (dark colour) and aabbcc (light colour), in generation, what proportion of the progeny is likely to resemble either parent?
Mirabilis jalapa shows
The gene that controls many characters is called
Multiple alleles are characterized by:
What will happen when there are two dominant genes in a qualitative type of inheritance?
What is the other name of qualitative inheritance?
Give an example of qualitative inheritance?
What is qualitative inheritance?
Choose the correct option regarding the inheritance of flower colour in Antirrhinum (dog flower).
Assertion: ABO blood group system is a good example of pleiotropic genes.
Reason: In ABO blood group system, when IA and IB alleles are present together, both express themselves.
Match the following:
| List I | List II | ||
| (i) | Pleiotropy | (a) | In a heterozygous organism both alleles express themselves fully |
| (ii) | Epistasis | (b) | Many genes governs a single character |
| (iii) | Incomplete dominance | (c) | A single gene influences many characters |
| (iv) | Polygenic inheritance | (d) | One gene influences the expression of other gene |
| (v) | Co-dominance | (e) | Heterozygote in intermediate between homozygous phenotypes |
