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Two linked genes a and b show 40% recombination. The individuals of a dihybrid cross between ++/++ X ab/ab shall produce gametes as

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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
Select the correct statement.
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes
Two genetic loci controlling two different traits two different traits are linked. During the inheritance of these traits, the Mendelian laws that would be affected is/are:
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes
Alkaptonuria (aa) is which type of error?
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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

The following family tree traces the occurrence of a rare genetic disease. The filled symbols signify the individuals with the disease, whereas the open symbols signify healthy individuals.

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Based on this information, the disease is most likely to be:

EASY
Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes
Define ‘linkage’.
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes
What is sex linkage?
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
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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

Assertion (A): The proportion of parental gene combinations was much lighter than non-parental type

Reason (R): Gene combination is due to linkage of the two genes

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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
HARD
Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes
How did Sturtevant explain gene mapping while working with Morgan?
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes
Identify the event in meiosis mediated by the enzyme recombinase.
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes

Give one significant difference between the following:

Linkage and crossing over

HARD
Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes
"Complete linkage is rare" explain it with a suitable example.
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes
Write differences between linkage and crossing over.
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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
Chromosomal theory of inheritance was proposed by:
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: