HARD
12th CBSE
IMPORTANT
Earn 100

A, B, D are three independently assorting genes with their recessive alleles a, b, d, respectively. A cross was made between individuals of Aa bb DD genotype with aa bb dd. Find out the type of genotypes of the offspring produced.

Important Questions on Principle of Inheritance and Variation

HARD
12th CBSE
IMPORTANT
NCERT Exemplar Biology - Class 12>Chapter 5 - Principle of Inheritance and Variation>VERY SHORT ANSWER TYPE QUESTIONS>Q 12
In our society, a woman is often blamed for not bearing a male child. Do you think it is right? Justify.
MEDIUM
12th CBSE
IMPORTANT
NCERT Exemplar Biology - Class 12>Chapter 5 - Principle of Inheritance and Variation>VERY SHORT ANSWER TYPE QUESTIONS>Q 13
Discuss the genetic basis of wrinkled phenotype of pea seed.
HARD
12th CBSE
IMPORTANT
NCERT Exemplar Biology - Class 12>Chapter 5 - Principle of Inheritance and Variation>VERY SHORT ANSWER TYPE QUESTIONS>Q 14
Even if a character shows multiple allelism, an individual will only have two alleles for that character. Why?
HARD
12th CBSE
IMPORTANT
NCERT Exemplar Biology - Class 12>Chapter 5 - Principle of Inheritance and Variation>VERY SHORT ANSWER TYPE QUESTIONS>Q 15
How does a mutagen induce mutation? Explain with example.
MEDIUM
12th CBSE
IMPORTANT
NCERT Exemplar Biology - Class 12>Chapter 5 - Principle of Inheritance and Variation>SHORT ANSWER TYPE QUESTIONS>Q 1
In a Mendelian monohybrid cross, the F2 generation shows identical genotypic and phenotypic ratios. What does it tell us about the nature of alleles involved? Justify your answer.
HARD
12th CBSE
IMPORTANT
NCERT Exemplar Biology - Class 12>Chapter 5 - Principle of Inheritance and Variation>SHORT ANSWER TYPE QUESTIONS>Q 2
Can a child have blood group O if his parents have blood group 'A' and 'B'? Explain.
HARD
12th CBSE
IMPORTANT
NCERT Exemplar Biology - Class 12>Chapter 5 - Principle of Inheritance and Variation>SHORT ANSWER TYPE QUESTIONS>Q 3
What is Down's syndrome? Give its symptoms and cause. Why is it that the chances of having a child with Down's syndrome increases if the age of the mother exceeds forty years?
HARD
12th CBSE
IMPORTANT
NCERT Exemplar Biology - Class 12>Chapter 5 - Principle of Inheritance and Variation>SHORT ANSWER TYPE QUESTIONS>Q 4
How was it concluded that genes are located on chromosomes?