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A pea plant with yellow and round seeds crossed with another pea plant with green and wrinkled seeds produced $51$ yellow round seeds and $49$ yellow wrinkled seeds. Genotype of plant with yellow and round seeds must be _____.

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Important Questions on Principles of Inheritance and Variation

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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes

In human beings, brown eye (B) is dominant over blue eye (b). A brown-eyed couple has a blue-eyed child. What are the possible genotypes of the couple?

HARD

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes

In a testcross involving F₁ dihybrid flies, more parental-type offspring were produced than the recombinant-type offspring. This indicates:

EASY

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes

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

MEDIUM

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes

Some of

F_{2}

progeny are formed during dihybrid cross between round and yellow

(\overset{↑}{o})

and wrinkled and green

(\overset{\circ}{+})

pea plants. Their genotypes are:

EASY

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes

With increasing age, the linkage ___.

EASY

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes

A round seeded tall pea plant is crossed with round seeded dwarf plant and obtained progeny are with following phenotypes
$3$ - Tall, Round
$3$ - Dwarf, Round
$1$ - Tall, Wrinkled
$1$ - Dwarf, Wrinkled

The possible genotype of parents:

MEDIUM

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes

Select the correct statement.

HARD

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes

A homozygous tall pea plant is crossed with its homozygous recessive parent. Find out the genotypic and phenotypic ratio with the help of Punnet square method.

HARD

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes

A cross wạs carried out between two individuals, heterozygous for two pairs of genes. Assuming segregation and independent assortment, the number of different genotypes and phenotypes obtained respectively would be

MEDIUM

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes

In Morgan's experiment with Drosophila, when a yellow bodied white-eyed female was crossed with brown bodied red-eyed male and their

F_{1}

Progeny were intercrossed. What was the percentage of recombinants in the

F_{2}

generation?

EASY

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes

The maximum number of different gametes of the pollens produced by a tall pea plant with round, yellow, seeds of the genotype

TtRrYY

, if the three loci are unlinked, would be

EASY

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes

Experimental verification of the chromosomal theory of inheritance was done by

HARD

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes

How will you find that F1 Hybrid is homozygous or heterozygous? Explain it with suitable example.

MEDIUM

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes

What is the possible genotypic ratio in

F_{2}

generation if a plant producing red flowers

(RR)

is crossed with another plant of the same species that produces white flowers

(rr) ?

MEDIUM

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes

Identify which one of the following is a test cross.

HARD

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes

Mendel crossed a homozygous pea plant having yellow and round seeds with another pea plant bearing green and wrinkled seeds. He found that in some of the F₂ population, new combinations of the parental characters were observed. How will you explain the appearance of a new combination of the parental characters in F₂ offspring? Support your answer with the help of a Punnett square.

HARD

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes

Write the scientific name of the organism Thomas Hunt Morgan and his colleagues worked with for their experiments. Explain the correlation between linkage and recombination with respect to genes as studied by them.

EASY

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes

Who proposed the chromosomal theory of inheritance?

EASY

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes

Chromosomal theory of inheritance was proposed by:

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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes

The term ''linkage'' was coined by:

A pea plant with yellow and round seeds crossed with another pea plant with green and wrinkled seeds produced 51 yellow round seeds and 49 yellow wrinkled seeds. Genotype of plant with yellow and round seeds must be _____.

Important Questions on Principles of Inheritance and Variation

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A pea plant with yellow and round seeds crossed with another pea plant with green and wrinkled seeds produced $51$ yellow round seeds and $49$ yellow wrinkled seeds. Genotype of plant with yellow and round seeds must be _____.