Answer :
Answer: 1:4 25%
Explanation:
Purple petal color in pea plants is dominant to white petal color. Two heterozygous pea plants are crossed.
What is the ratio of the offspring with white petals to the total number of offspring?
21
⇒ 1:
3323
⇒ 4
Express this in a percentage.
3
⇒ 25%
The ratio of the offspring with white petals to the total number of offspring is 1:4 and the express this in a percentage is 25%.
What is heterozygous?
Heterozygous is different forms of a particular gene that is inherited from parent. e.g Gene A has form of A and a
A cross between two heterozygous pea plants
Pea plant A is Aa
Pea plant B is Aa
Therefore, a cross between the 2 plants will give
Aa×Aa
I
AA Aa Aa aa
The total number of offspring is 4 (AA, Aa,Aa,Aa)
where AA,Aa and Aa are Purple pea plant and aa is a white pea plant.
Since the number of pea plant is 4, the ratio of the offspring with white petals will be 1:4
in the number of offspring in % will be
1/4*100= 25% of the total population.
Therefore, The ratio of the offspring with white petals to the total number of offspring is 1:4 and the express this in a percentage is 25%.
For more details on heterozygous crosses kindly check
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