HARD
12th CBSE
IMPORTANT
Earn 100

With the help of an example, differentiate between incomplete dominance and codominance.

Important Questions on Principle of Inheritance and Variation

HARD
12th CBSE
IMPORTANT
NCERT Exemplar Biology - Class 12>Chapter 5 - Principle of Inheritance and Variation>SHORT ANSWER TYPE QUESTIONS>Q 15
It is said, that the harmful alleles get eliminated from population over a period of time, yet sickle cell anaemia is persisting in human population. Why?
HARD
12th CBSE
IMPORTANT
NCERT Exemplar Biology - Class 12>Chapter 5 - Principle of Inheritance and Variation>LONG ANSWER TYPE QUESTIONS>Q 1
In a plant, tallness is dominant over dwarfness and red flower is dominant over white. Starting with the parents work out a dihybrid cross. What is the standard dihybrid ratio? Do you think the values would deviate if the two genes in question are interacting with each other?
HARD
12th CBSE
IMPORTANT
NCERT Exemplar Biology - Class 12>Chapter 5 - Principle of Inheritance and Variation>LONG ANSWER TYPE QUESTIONS>Q 2
In humans, males are heterogametic and females are homogametic. Explain. Are there any examples where males are homogametic and females heterogametic?
HARD
12th CBSE
IMPORTANT
NCERT Exemplar Biology - Class 12>Chapter 5 - Principle of Inheritance and Variation>LONG ANSWER TYPE QUESTIONS>Q 2
Describe who determines the sex of an unborn child in humans? Mention whether the temperature has a role in sex determination.
HARD
12th CBSE
IMPORTANT
NCERT Exemplar Biology - Class 12>Chapter 5 - Principle of Inheritance and Variation>LONG ANSWER TYPE QUESTIONS>Q 3
A normal visioned woman, whose father is colour blind, marries a normal visioned man. What would be the probability of her sons and daughters to be colour blind? Explain with the help of a pedigree chart.
HARD
12th CBSE
IMPORTANT
NCERT Exemplar Biology - Class 12>Chapter 5 - Principle of Inheritance and Variation>LONG ANSWER TYPE QUESTIONS>Q 4
Discuss in detail the contributions of Morgan and Sturtevant in the area of genetics.
HARD
12th CBSE
IMPORTANT
NCERT Exemplar Biology - Class 12>Chapter 5 - Principle of Inheritance and Variation>LONG ANSWER TYPE QUESTIONS>Q 5
Define aneuploidy. How is it different from polyploidy? Describe the individuals having trisomy of the 21st chromosome.
MEDIUM
12th CBSE
IMPORTANT
NCERT Exemplar Biology - Class 12>Chapter 5 - Principle of Inheritance and Variation>LONG ANSWER TYPE QUESTIONS>Q 5
Describe the individual having chromosomal abnormalities XXY.