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What Is Monohybrid Cross?

State the Men...

Question

State the Mendelian principle which can be derived from a dihybrid cross and not from monohybrid cross.

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Solution

Law of Independent Assortment states that in a dihybrid cross(cross containing two traits) each trait separates independently of each other without mixing.
The two traits remain independent of each other.
In gene interaction, this law is violated and genes at different loci interfere with each other.

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Q. Work out a typical Mendelian dihybrid cross and state the law that he derived from it.

Q. Five Mark Questions :
(a) A true breeding homozygous Pea plant with green pods and axial flowers as dominant characters is crossed with a recessive homozygous Pea plant with yellow pods and terminal flowers. Work out the cross upto

F_{2}

generation giving the phenotypic ratios of

F_{1}

F_{2}

generations respectively.
(b) State the Mendelian principle which can be derived from such a cross and not from monohybrid cross.

Q. Five Mark Questions :
Workout a typical Mendelian dihybrid cross and state the law that he derived from it.

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?

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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What Is Monohybrid Cross?

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