Deviation from Mendelism
Deviation from Mendelism: Overview
This topic covers concepts, such as, Deviation from Mendelism, Pleiotropy & Polygenic Inheritance etc.
Important Questions on Deviation from Mendelism
The fundamental cause of the sickle-cell disease is a change in the structure of:
When one gene controls two or more different characters simultaneously, the phenomenon is called
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?
Multiple alleles do not undergo crossing over.
Identify the incorrect statement with reference to hybridisation experiment in lentil.
Which one of the following is not caused by pleiotropic alleles?
If one gene influences many phenotypic traits, the phenomenon is called
Choose the wrong statement
(A) A single gene product may produce more than one effect thus it relates to pleiotropy.
(B) Dominance is an autonomous feature of a gene or the product.
(C) The frequency of recombination between gene pairs on the same chromosome as a measure of distance between those genes.
(D) Breeder cannot select the mutations of the desirable types as it has less variability.
The correct answer is:
When the inheritance of a character is determined by many genes with the same but cumulative phenomenon, the effect is called quantitative inheritance.
When two genes control a single character and have cumulative effect, the ratio is
What are polygenes? Explain with suitable example.
Skin colour is controlled by
Who studied the inheritance of skin colour in negro and white population in USA?
Who discovered polygenic inheritance?
The additive or cumulative effect is shown by
In pleiotropic inheritance, different traits are controlled by
Interaction between the alleles of different genes on the same or different chromosome is called
Define polygene.
What are polygenic characters?
Color of the skin in human beings is controlled by
