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In a typical Mendelian cross which is a dihybrid cross, one parent is homozygous for dominant traits and another parent is homozygous for both recessive traits, In the F2 generation, both parental combinations and recombinations appear. The phenotypic ratio of parental combinations to recombinations is

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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
The term ''linkage'' was coined by:
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes
Who proposed the chromosomal theory of inheritance?
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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 F1 plants were selfed the resulting genotypes were in the ratio
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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:

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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
What is the possible genotypic ratio in F2 generation if a plant producing red flowers RR is crossed with another plant of the same species that produces white flowers rr?
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes
Select the correct statement.
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes
Identify which one of the following is a test cross.
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes
With increasing age, the linkage ___.
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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
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes
Some of F2 progeny are formed during dihybrid cross between round and yellow o↑ and wrinkled and green +∘ pea plants. Their genotypes are:
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes
Who is known as the father of Genetics?
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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
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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?
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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.
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes
Alleles are:
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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.
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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 F1 Progeny were intercrossed. What was the percentage of recombinants in the F2 generation?
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes
Experimental verification of the chromosomal theory of inheritance was done by
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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: