Single Choice

An example of the quantitative trait in man is

AHair colour
BColour of eye
CSkin colour
Correct Answer
DShape of nose

Solution

A measurable trait that shows continuous variation; a trait that can not be classified into a few discrete classes is called as quantitative trait.
Examples of quantitative traits include height, skin colour, weight and blood pressure. There is no single gene for any of these traits, instead it is generally believed that continuous variation in a trait such as blood pressure is partly due to DNA sequence variations at multiple genes.

SIMILAR QUESTIONS

Genetics

Which one of the following best describe polygenic inheritance?

Genetics

Match column I with column II and select the correct option from the given codes. Column I Column II A. Multiple alleles (i) Phenylketonuria in Humans B. Polygenes (Multiple genes) (ii) Blood groups in humans C. Pleiotropic (iii) Skin color in humans

Genetics

Number of genotypes produced when individuals of genotype 'YyRrTt' are crossed with each other is

Genetics

Which pair of features represents polygenic inheritance?

Genetics

How many types of gametes are expected from the organism with genotype AABBCC?

Genetics

When AABBcc is crossed with AaBbCc then the ratio of hybrid for all the three genes is

Genetics

A dihybrid ratio of 1 : 4 : 6 : 4 : 1 is obtained instead of 9 : 3 : 3 : 1. This is an example of

Genetics

Polygenic inheritance was first noted by

Genetics

A polygenic inherited trait is controlled by three pairs of genes. Two individuals which are heterozygous for three alleles, are crossed with each other. What will be the phenotypic ratio of offspring?

Genetics

In a plant, three dominant independently assorting genes A, B and C are essential for production of purple pigment. If any of the genes or all three genes are present in recessive condition then flower is colourless. Raw material $$\overset { A }{ \rightarrow} X \overset { B }{ \rightarrow} Y \overset { C }{ \rightarrow} Z$$ pigment A purple plant with genotype AABBCC cossed with a clourless plant with genotype aabbcc gives purple $$F_1$$ hybrid. On selfing of $$F_1$$, what will be the proportion of coloured offspring in $$F_2$$?

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