Deviation from Mendelism

The fundamental cause of the sickle-cell disease is a change in the structure of:

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 $F_2$ generation, what proportion of the progeny is likely to resemble either parent?

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:

A quantitative character is controlled by four polygenes. Find out probability of parental plant in F₂ generation ?

In case of duplicate genes which are non-allelic then what will be possibility of being triangular seeds when gene A and gene B are present separately in plants?

How many types of phenotypes are formed in polygenic inheritance of wheat kernel colour?

Which one of the following genotypes can form only 2 different types of gametes?

The phenotype of one parent for skin colour is $\mathrm{AABBCC}$ and other parent is $\mathrm{aabbcc}$. What will be the skin colour and genotype for their progeny?

What are the deviation from Mendelian ratio?

Which of the following is an example of polygenic trait?

The phenomenon of single gene-regulating several phenotypes is called

The gene that controls many characters is called

Which law of Mendel is discarded by incomplete dominance?

What will be number of gene pairs controlling a single character in polygenic inheritance if the phenotypic ratio obtained in ${\mathrm{F}}_2$ generation is $1 : 6 : 15 : 20 : 15 : 6 : 1?$

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