HARD
Earn 100

If height of plant is quantitative trait control by three gene loci. If height of aabbcc is 15 cm and each gene contribute 5 cm, give height of AABBCC and AaBbCc.

Important Questions on Principles of Inheritance and Variation

EASY
Mutation in a single gene can lead to changes in multiple traits. This is an example of
MEDIUM

Directions: Each of the following sentences in this section has a blank space and four words or group of words given after the sentence. Select the word or group of words you consider most appropriate for the blank space and indicate your response on the Answer Sheet accordingly.

Every rash driver becomes a ____ killer.

EASY
If one gene influences many phenotypic traits, the phenomenon is called
EASY

Match the following 

   List - I     List - II
(a) Holandric genes (i) Pleiotropy
(b) Multiple effects of a single gene (ii) Hypertrichosis
(c) Skin colour in man (iii) Multiple Alleles
(d) ABO Blood types (iv) Polygenic inheritance

The correct answer is

MEDIUM
The inheritance of flower colour (pink) in Mirabilis jalapa is the example of 
EASY

Two sentences are given below and you are required to find the correct sentence which combines both the sentences.

Which is the correct combination of the given two sentences?

He is too tired. He could not stand.

MEDIUM
The phenotype of one parent for skin colour is AABBCC and other parent is aabbcc. What will be the skin colour and genotype for their progeny?
MEDIUM

In the following sentence, a blank space with four options is given. Select whichever preposition or determiner you consider the most appropriate for the blank space.

These are the good rules to live _____.

HARD
In a mating between two mulattos, each heterozygous at all three gene loci for the skin colour, what is the chance their child will have very light skin?
EASY
One of the following is quantitative abnormality of polypeptide globin chain synthesis
EASY
What will be number of gene pairs controlling a single character in polygenic inheritance if the phenotypic ratio obtained in F2 generation is 1 : 6 : 15 : 20 : 15 : 6 : 1?
HARD
F2 phenotypic ratio of 1:2:1 in monohybrid cross indicates the presence of which one of the following phenomenon?
EASY
Choose the possible genotypes responsible for lightest skin colour in human beings.
HARD

Human height is a multigenic character. If the heights of all the individuals living in a metropolis are measured and the percentages of the population belonging to a specific heat are plotted as shown below, which of the plots would represent the most realistic distribution?
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