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The Law of Independent Assortment

The proportio...

Question

The proportion of phenotypic ratio 3:1 at the $F_{2}$ generation is explained by the

A

Law of dominance

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B

Law of segregation

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C

Law of independent assortment

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D

Test cross

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Solution

The correct option is B Law of segregation
Mendel’s law of segregations supports the phenotypic ratio of 3:1 i.e. the homozygous dominant and heterozygous offsprings show dominant traits while the homozygous recessive shows the recessive trait.
Mendel's of segregation states that when two traits come together in one hybrid pair, the two characters do not mix with each other and are independent of each other. Each gamete receives one of the two alleles during meiosis of the chromosome.

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Similar questions

Q. Which of the following statement(s) is /are correct regarding the Mendelian dihybrid cross?
A. The F2 phenotypic ratio is 9 : 3 : 3 : 1
B. Law of independent assortment can be explained on the basis of the dihybrid cross
C. F2 generation is obtained through the cross between F1 plants with one of the two parental plants
D. The gametes produced by F1 plants are of 4 types in 1:1:1:1 ratio.

Q. (a) Explain a monohybrid cross taking seed coat colour as a trait in Pisum sativum. Work out the cross up to

F_{2}

generation.
(b) State the laws of inheritance that can be derived from such a cross.
(c) How is the phenotypic ratio of

F_{2}

generation different in a dihybrid cross?

The hereditary principle derived from the results showing new combinations in addition to parental combinations in $F_{2}$ generation is

Q. Read the description given below and identify the type of genetic cross.

The cross takes into account two different traits. The offsprings obtained in the second filial generation show a phenotypic ratio of 9:3:3:1. Mendel proposed his law of independent assortment based on observations form these genetic crosses.

Q. Short / Long answer type questions.
Explain a monohybrid cross taking seed Coat colour as a trait in Pisum sativum. Work out the cross up to F2 generation. (b) State the laws of inheritance that can be derived from such a cross. (c) How is the phenotypic ratio of F2 generation different in a dihybrid cross?

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