Sex linkage is the phenotypic expression of an allele that is dependent on the gender of the individual and is directly concerned with the sex chromosomes. The progeny produced are more of parental type and fewer recombinants.

HARD

Earn 100

The experiment carried out by Morgan is shown in the figure to explain the phenomenon of linkage and recombination. If in cross-I, genes are tightly linked and in cross-II, genes are loosely linked then what will be the percentage of recombinants produced in cross-I and cross-II respectively?

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Important Questions on Inheritance and Variation

EASY

Biology>Genetics and Evolution>Inheritance and Variation>Linkage and Crossing Over

The term ''linkage'' was coined by:

MEDIUM

Biology>Genetics and Evolution>Inheritance and Variation>Linkage and Crossing Over

Select the correct statement.

MEDIUM

Biology>Genetics and Evolution>Inheritance and Variation>Linkage and Crossing Over

The genetic distance between genes

A

and

B

10 cM

. An organism with

Ab

combination of the alleles is crossed with the organism with

aB

combination of alleles. What will be the percentage of the gametes with

AB

allele combination by an

F_{1}

individual?

MEDIUM

Biology>Genetics and Evolution>Inheritance and Variation>Linkage and Crossing Over

A plant heterozygous for height and flower colour

(TtRr)

are selfed and

1600

of the resulting seeds are planted. If the distance between the loci controlling height and the flower colour is

1

centiMorgan (cM), then how many offsprings are expected to be short with white flower

(ttrr)

?

EASY

Biology>Genetics and Evolution>Inheritance and Variation>Linkage and Crossing Over

With increasing age, the linkage ___.

MEDIUM

Biology>Genetics and Evolution>Inheritance and Variation>Linkage and Crossing Over

In a dihybrid cross between genes yellow, white and miniature characters, the parental

%

between yellow and white and recombination % is

92

and

8

respectively, and the cross between white and miniature characters, the recombination is

38 %

and parental is

62 %

. Identify the genetic map of these.

EASY

Biology>Genetics and Evolution>Inheritance and Variation>Linkage and Crossing Over

Define ‘linkage’.

MEDIUM

Biology>Genetics and Evolution>Inheritance and Variation>Linkage and Crossing Over

What is sex linkage?

HARD

Biology>Genetics and Evolution>Inheritance and Variation>Linkage and Crossing Over

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>Inheritance and Variation>Linkage and Crossing Over

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