Question

*Biology Assignment*
*Date: 8th September 2020*

*HEREDITY AND EVOLUTION*

1.In a cross between plants with purple flowers and plants with white flowers, the offspring of F1 generation had all purple flowers. When F1 generation individuals were self bread, the F2 generation gave rise to 100 individuals, 75 of which had purple flowers. Make a cross and answer the following-
a) What is the genotype of F2 individuals
b) What is the ratio of purple to white flowers in F2 generation?

2. Genotype of a plant bearing purple flowers is PP and one with white flowers is pp. When these are crossed-
a) What colour of flowers would you find in F1 progeny?

b) Give the percentage of white flowers if F1 plants are self pollinated.

c) In what ratio would you find PP and Pp in F2 progeny? Draw a flowchart in support of your answer.

3.One plant with dominant tall height bearing purple flowers is crossed with another plant having recessive dwarf and white flowers.
Make a cross to show both F1 and F2 generations and answer the following questions.
a) What do plants of F1 generation look like?
b) What type of cross is it?
c) Give the phenotypic ratio of the F2 generation. Also mention the name of each phenotype obtained.​

Answer 1

1. a. were self bread, the F2 generation gave rise to 100 individuals, 75 of which had purple flower

b. 100:75

c.