A tall true breeding garden pea plant is crossed with a dwarf true breeding garden pea plant. When the F 1 plants were selfed the resulting genotypes were in the ratio

1 : 2 : 1 :: Tall homozygous : Tall heterozygous : Dwarf

1 : 2 : 1 :: Tall heterozygous : Tall homozygous : Dwarf

E M B I B E

NTA Errorless Biology Volume-2>Chapter 5 - Principles of Inheritance and Variation>Ordinary Thinking>Q 13

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When a dihybrid cross is fit into a punnett square with $16$ boxes, the maximum number of different phenotypes available are:

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Important Questions on Principles of Inheritance and Variation

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NTA Errorless Biology Volume-2>Chapter 5 - Principles of Inheritance and Variation>Ordinary Thinking>Q 15

In Mendel's experiment how many different kinds of seeds are produced from a short plant with wrinkled seeds (ttrr)?

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NTA Errorless Biology Volume-2>Chapter 5 - Principles of Inheritance and Variation>Ordinary Thinking>Q 17

Two pea plants were subjected cross pollination. Of the

183

plants produced in the next generation,

94

plants were found to be tall and

89

plants were found to be dwarf. The genotypes of the two parental plants are likely to be

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NTA Errorless Biology Volume-2>Chapter 5 - Principles of Inheritance and Variation>Ordinary Thinking>Q 18

A homozygous sweet pea plant with blue flowers

(RR)

and long pollen

(R_{0} R_{0})

is crossed with a homozygous plant having red flowers (rr) and round, pollen

(r_{o} r_{o})

. The resultant

F_{1}

, hybrid is test crossed. Which of the following genotype does not appear in its progeny?

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NTA Errorless Biology Volume-2>Chapter 5 - Principles of Inheritance and Variation>Ordinary Thinking>Q 19

Ratio of progeny when a red coloured heterozygote is crossed with a white coloured plant in which red colour is dominant in white colour

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NTA Errorless Biology Volume-2>Chapter 5 - Principles of Inheritance and Variation>Ordinary Thinking>Q 20

A true-breeding plant producing red flowers is crossed with a pure plant producing white flowers. The allele for the red colour of the flower is dominant. After selfing the plants of the first filial generation, the proportion of plants producing white flowers in the progeny would be:

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NTA Errorless Biology Volume-2>Chapter 5 - Principles of Inheritance and Variation>Ordinary Thinking>Q 21

Which one of the following represents a test cross

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NTA Errorless Biology Volume-2>Chapter 5 - Principles of Inheritance and Variation>Ordinary Thinking>Q 22

How many types of genotypes are formed in