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.

EASY

Earn 100

Genes located very close to one another on the same chromosome tend to be transmitted together and are called _____.

50% studentsanswered this correctly

Important Questions on Principles of Inheritance and Variation

EASY

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

Identify the event in meiosis mediated by the enzyme recombinase.

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

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:

MEDIUM

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

EASY

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

With increasing age, the linkage ___.

MEDIUM

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

Alkaptonuria (aa) is which type of error?

MEDIUM

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

Select the correct statement.

MEDIUM

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

Write differences between linkage and crossing over.

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?

HARD

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

How did Sturtevant explain gene mapping while working with Morgan?

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

Give one significant difference between the following:

Linkage and crossing over

MEDIUM

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.

Question Image