Deviation from Mendelian Ratios
Deviation from Mendelian Ratios: Overview
This topic covers concepts, such as, Deviation from Mendelism,Gene Interaction,Incomplete Dominance etc.
Important Questions on Deviation from Mendelian Ratios
What would be the genotype of:
(i) An individual who is carrier of sickle cell anaemia gene but apparently unaffected.
(ii) An individual affected with the disease.
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 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 person with blood group A requires blood. The blood group which can be given is
The most popularly known blood grouping is the ABO grouping. It is named ABO and not ABC, because “O” in it refers to having:
Sickle cell anaemia is characterised by
In the ABO system of blood groups, if both antigens are present but no antibody, the blood group of the individual would be
With respect to the ABO group, there are four major blood types because this blood group is determined by
Blood group AB has
When one gene controls two or more different characters simultaneously, the phenomenon is called
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
Blood groups in man is an example of
A typical 1 : 2 : 1 phenotypic ratio in a monohybrid cross is characteristic of
A single point mutation in gene 'X' results in breathing difficulty, hypertension as well as partial sterility. Which among the following phenomenon best explains the observed phenotype?
The phenomenon of pleiotropism refers to:
Heterozygous plants of garden pea were self-fertilised. In the progeny, 750 round seeded plants were obtained. How many plants in the progeny will have intermediate size starch grain?
Given below is the representation of a portion of mutated beta globin chains of haemoglobin due to single base substitution at the 6th codon on mRNA.
Such a mutation cause
