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Question
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.
(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.
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Solution
A monohybrid cross is a cross with one pair of contrasting characters.Out of the two alleles for a particular gene one is the dominant allele another is the recessive allele.
The phenotypic raion in monohybrid cross is 3:1.
Law of dominance states that in a pair of alleles one is a dominant character and other is a recessive character. Only the dominant character will show itself in the heterozygous trait. The recessive character can show itself when it is present in a homozygotic condition. This is derived from the monohybrid cross.
Out of the two alleles for a particular gene one is the dominant allele another is the recessive allele.
The phenotypic raion in monohybrid cross is 3:1.
Law of dominance states that in a pair of alleles one is a dominant character and other is a recessive character. Only the dominant character will show itself in the heterozygous trait. The recessive character can show itself when it is present in a homozygotic condition. This is derived from the monohybrid cross.
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