MEDIUM
10th CBSE
IMPORTANT
Earn 100

Pure-bred tall pea plants are first crossed with pure-bred dwarf pea plants. The pea plants obtained in F1 generation are then cross-bred to produce F2 generation of pea plants.
What is the ratio of tall plants to dwarf plants in F2 generation?
 

Important Questions on Heredity and Evolution

MEDIUM
10th CBSE
IMPORTANT
Science for Tenth Class Part - 3 Biology>Chapter 4 - Heredity and Evolution>Questions Based on High Order Thinking Skills (HOTS)>Q 68
Pure-bred tall pea plants are first crossed with pure-bred dwarf pea plants. The pea plants obtained in F1 generation are then cross-bred to produce F2 generation of pea plants.
Which type of plants were missing in F1 generation but reappeared in F2 generation?
MEDIUM
10th CBSE
IMPORTANT
Science for Tenth Class Part - 3 Biology>Chapter 4 - Heredity and Evolution>Questions Based on High Order Thinking Skills (HOTS)>Q 69
A plant has two varieties, one with red petals and the other with white petals. When these two varieties are cross-pollinated, all the offspring have red petals?
(A) Which gene is dominant?
(B) Choose suitable letters to represent the two genes.
MEDIUM
10th CBSE
IMPORTANT
Science for Tenth Class Part - 3 Biology>Chapter 4 - Heredity and Evolution>Questions Based on High Order Thinking Skills (HOTS)>Q 70
A red-haired woman marries a brown-haired man, and all the children are brown-haired. Explain this genetically.
MEDIUM
10th CBSE
IMPORTANT
Science for Tenth Class Part - 3 Biology>Chapter 4 - Heredity and Evolution>Questions Based on High Order Thinking Skills (HOTS)>Q 71
A black mouse mates with a brown mouse, and all the offspring are black.
(A) Why are no brown offsprings produced?
(B) If two of the black offspring mate with each other what kind of offspring would you expect and in what proportions? Give reason for your answer.
MEDIUM
10th CBSE
IMPORTANT
Science for Tenth Class Part - 3 Biology>Chapter 4 - Heredity and Evolution>Questions Based on High Order Thinking Skills (HOTS)>Q 72
E is the gene for brown eye colour and e is the gene for blue eye colour.
Which gene is (i) recessive, and (ii) dominant?
 
MEDIUM
10th CBSE
IMPORTANT
Science for Tenth Class Part - 3 Biology>Chapter 4 - Heredity and Evolution>Questions Based on High Order Thinking Skills (HOTS)>Q 72
Both father and mother have the genes Ee in their cells. What colour are their eyes?
MEDIUM
10th CBSE
IMPORTANT
Science for Tenth Class Part - 3 Biology>Chapter 4 - Heredity and Evolution>Questions Based on High Order Thinking Skills (HOTS)>Q 72
Which combination of genes in the zygote will produce children with blue eyes?
 
MEDIUM
10th CBSE
IMPORTANT
Science for Tenth Class Part - 3 Biology>Chapter 4 - Heredity and Evolution>Questions Based on High Order Thinking Skills (HOTS)>Q 72
Which combinations of genes in the zygote will produce children with brown eyes?