A Pea Plant with Blue Colour Flower Denoted by bb is Cross-bred with a Pea Plant with White Flower Denoted by ww - Science

Advertisements
Advertisements

A pea plant with blue colour flower denoted by BB is cross-bred with a pea plant with white flower denoted by ww.

(a) What is the expected colour of the flowers in their F1 progeny?

(b) What will be the percentage of plants bearing white flower in F2 generation, when the flowers of F1 plants were selfed?

(c) State the expected ratio of the genotype BB and Bw in the F2 progeny.

Advertisements

Solution

(a) The expected colour of flowers in their F1 progeny is blue.

(b) 1/4 of the F2 generation have white flowers. So, we can calculate the percentage as follows:-

1/4 × 100 = 25%

Hence, the percentage of plants bearing white flowers in F2 progeny is 25.

(c) The ratio of the genotype BB and Bw in the F2 progeny is 1 (BB) : 2 (Bw).

Concept: Heredity
  Is there an error in this question or solution?
2014-2015 (March) All India Set 2

Video TutorialsVIEW ALL [3]

RELATED QUESTIONS

How do Mendel’s experiments show that the traits may be dominant or recessive 


In a monohybrid cross between tall pea plants (TT) and short pea plants (tt), a scientist obtained only tall pea plants (Tt) in the F1 generation. However, on selfing the F1 generation pea plants, he obtained both tall and short plants in F2 generation. On the basis of above observations with other angiosperms also, can the scientist arrive at a law? If yes, explain the law. If not, give justification for your answer.


Define heredity.


Mendel in one of his experiments with pea plants crossed a variety having round seed with one having wrinkled seeds. Write his observations, giving reasons, of F1 and F2 progeny


Outline a project which aims to find the dominant coat colour in dogs.


With the help of two suitable examples, explain why certain experiences and traits earned by people during their lifetime are not passed on to their next generations. When can such traits be passed on?


   What is the genotype of dwarf plants which always produced dwarf offspring?


What is the genotype of tall plants which always produced tall offspring


How do Mendel's experiments show that traits are inherited independently?


Explain the mechanism of hereditary changes.


Mendel, in one of his experiments with pea plants, crossed a variety of pea plant having round seeds with one having wrinkled seeds. State Mendel’s observations giving reasons of F1 and F2 progeny of this cross. Also, list any two contrasting characters, other than round seeds of pea plants that Mendel used in his experiments.


Hereditary characters are transferred from parents to offspring by ______ hence they are said to be structural and functional units of heredity.


Define Heredity. Give two examples.


Answer the following question.
Why are the traits acquired during the life-time-of-an individual not inherited? Explain.


Who is the pioneer of modern genetics?


Write advantages of science of heredity.


____________ refers to the transmission of genetic information from parental generation to next generation.


What are the components of the DNA molecule?


Share
Notifications



      Forgot password?
Use app×