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The Punnett Tool

Five Mark Que...

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Five Mark Questions :
A particular garden Pea plant produces only violet flowers. How will you determine whether it is homozygous or heterozygous dominant. Explain with the help of crosses.

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Solution

Thus the Pea plant is homozygous dominant .

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Similar questions

A particular garden pea plant produces plants that have only violet flowers.

(a) Is it homozygous or heterozygous dominant for the trait?

(b) How would you ensure its genotype? Explain with the help of crosses. [5]

Q. Five Mark Questions :
(a) A garden Pea plant bearing terminal, violet flowers when crossed with another pea plant bearing axial violet flowers, produced axial violet flowers and axial white flowers in the ratio of 3 : 1. Work out the cross, showing the genotypes of the parent Pea plants and their progeny.
(b) Name and state the law that can be derived from this cross and not from a monohybrid cross.

Q. A pea plant heterozygous for violet flowers can produce offspring with white flowers if it is crossed with a

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. (a) How would you find out whether a given tall garden pea plant is homozygous or heterozygous? Substantiate your answer with the help of Punnett squares.

(b) Given below are the

F_{2}

-phenotypic ratios of two independently carried monohybrid crosses:
(i) 1:2:1
(ii) 3:1
Mention what does each ratio suggest. [5 marks]

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