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Independent assortment of the gene occurs due to the orientation of chromosomes at

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Important Questions on Principles of Inheritance and Variation

MEDIUM
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?
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 F1 Progeny were intercrossed. What was the percentage of recombinants in the F2 generation?
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 F1 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 F2 progeny are formed during dihybrid cross between round and yellow o↑ and wrinkled and green +∘ pea plants. Their genotypes are:
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
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:

EASY
Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two Genes
Who proposed the chromosomal theory of inheritance?
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.
EASY
Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two Genes
Chromosomal theory of inheritance was proposed by:
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
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
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:
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 F2 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.
EASY
Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two Genes
A true breeding plant is:
EASY
Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two Genes
Alleles are:
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
EASY
Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two Genes
The term ''linkage'' was coined by:
MEDIUM
Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two Genes
Select the correct statement.