Observe the given pedigree chart and answer the following questions. Identify whether the trait is sex linked or autosomal.

In the given diagram the trait is sex linked. As the character is inherited from one of the X chromosome of XY. Sex-linked describes the sex-specific patterns of inheritance and presentation when a gene mutation (allele) is present on a sex chromosome (allosome) rather than a non-sex chromosome (autosome). Sex linkage is the phenotypic expression of an allele that is dependent on the gender of the individual and is directly tied to the sex chromosomes.

Observe the given pedigree chart and answer the following questions. Give an example of a trait in human beings which shows such a pattern of inheritance.

Colour blindness is a defective condition of vision where the affected person cannot distinguish between red, green and blue colours. This happens due to the lack of cones in the retina of the eyes. It is a hereditary disease that cannot be cured.

E M B I B E

Biology Standard 12>Chapter 3 - Inheritance and Variation>Exercise>Q 3

MEDIUM

12th Maharashtra Board

IMPORTANT

Earn 100

Explain the chromosomal theory of inheritance.

Important Questions on Inheritance and Variation

MEDIUM

12th Maharashtra Board

IMPORTANT

Biology Standard 12>Chapter 3 - Inheritance and Variation>Exercise>Q 3

Observe the given pedigree chart and answer the following questions.
Question Image
Identify whether the trait is sex linked or autosomal.

MEDIUM

12th Maharashtra Board

IMPORTANT

Biology Standard 12>Chapter 3 - Inheritance and Variation>Exercise>Q 3

Observe the given pedigree chart and answer the following questions.
Question Image
Give an example of a trait in human beings which shows such a pattern of inheritance.

HARD

12th Maharashtra Board

IMPORTANT

Biology Standard 12>Chapter 3 - Inheritance and Variation>Exercise>Q 5

What is dihybrid cross? Explain with suitable example and checker board method.

HARD

12th Maharashtra Board

IMPORTANT

Biology Standard 12>Chapter 3 - Inheritance and Variation>Exercise>Q 5

Explain with the suitable example an independent assortment.

EASY

12th Maharashtra Board

IMPORTANT

Biology Standard 12>Chapter 3 - Inheritance and Variation>Exercise>Q 5

Define test cross and explain its significance.

MEDIUM

12th Maharashtra Board

IMPORTANT

Biology Standard 12>Chapter 3 - Inheritance and Variation>Exercise>Q 5

What is parthenogenesis? Explain the haplo-diploid method of sex determination in Honey bee.

MEDIUM

12th Maharashtra Board

IMPORTANT

Biology Standard 12>Chapter 3 - Inheritance and Variation>Exercise>Q 5

In the answer for inheritance of X-linked genes, Madhav had shown carrier male. His answer was marked incorrect. Madhav was wondering why his marks were cut. Explain the reason.

MEDIUM

12th Maharashtra Board

IMPORTANT

Biology Standard 12>Chapter 3 - Inheritance and Variation>Exercise>Q 5

With the help of neat labelled diagram, describe the structure of chromosome.