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CBSE 10th Social Science ECO - Globalisation and the Indian Economy - New Model Questions Papers Study Material - QB365 Set A

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CBSE 10th Social Science ECO - Money and Credit - New Model Questions Papers Study Material - QB365 Set A

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CBSE 10th Social Science ECO - Sectors of the Indian Economy - New Model Questions Papers Study Material - QB365 Set A

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CBSE 10th Social Science ECO - Development - New Model Questions Papers Study Material - QB365 Set A

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CBSE 10th Social Science PS - Outcomes of Democracy - New Model Questions Papers Study Material - QB365 Set A

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10th Standard CBSE

CBSE 10th Social Science PS - Gender, Religion and Caste - New Model Questions Papers Study Material - QB365 Set A

CBSE 10th Standard Science Subject Heredity and Evolution Ncert Exemplar 1 Mark Questions 2021

Published on: 26/05/2021

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Questions:

Generic 2

5 x 2 = 10

What happened when Mendel crossed two traits of a character in a pea plant?

A woman with blonde curly hair married a man with black soft hair. All of their children in first generation had black soft hair but in next generation children had different combinations in the ratio of 9 : 3 : 3 : 1. State the law that governs this expression.

What will be the sex of a baby if sperm carrying X chromosome fertilizes egg in human beings? Why?

What is speciation?

Wild cabbage was converted into number of variants like cauliflower, broccoli and cabbage by man. What is this process known as?

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Answers Key:

Generic 2

5 x 2 = 10

Only dominant trait appeared in F₁ generation.

According to the Law of independent assortment " the factors of different pairs of contrasting characters do not influence each other. They are independent of one another in their assortment."

It will be a baby girl because fusion of gametes having X chromosomes leads to homozygous condition producing zygote with XX composition.

The process by which new species develop from the existing species is known as speciation.

This process is known as artificial selection.