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Question
An F1 generation plant produces flowers in which red and white petals are found in the same flower. One of the parents of this plant produced red flowers and the other parent produced white flowers. This is an example of which of the following forms of inheritance?
An F1 generation plant produces flowers in which red and white petals are found in the same flower. One of the parents of this plant produced red flowers and the other parent produced white flowers. This is an example of which of the following forms of inheritance?
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Solution
The correct option is A Co-dominance
The F1 plant has two different colours in the petals of its flowers.
This indicates that both the alleles of the gene (red and white colour) are co-dominant with each other and are expressed independently in the heterozygote. This phenomenon is called co-dominance.
Incomplete dominance does not result in two different phenotypes, rather an intermediate phenotype is seen in the hybrid. For example, in the dog flower (Antirrhinum), the cross between red and white-flowered plants produces pink-flowered plants.
The above given case is not an example of dominance as both alleles have expressed equally in the F1. In case of dominance, out of the two alleles controlling the expression of the character, only one allele is expressed in the F1 generation.
Crossing two organisms which differ in two characters is called a dihybrid cross. As only one character is discussed in the question, it cannot be an example of dihybrid cross.
The F1 plant has two different colours in the petals of its flowers.
This indicates that both the alleles of the gene (red and white colour) are co-dominant with each other and are expressed independently in the heterozygote. This phenomenon is called co-dominance.
Incomplete dominance does not result in two different phenotypes, rather an intermediate phenotype is seen in the hybrid. For example, in the dog flower (Antirrhinum), the cross between red and white-flowered plants produces pink-flowered plants.
The above given case is not an example of dominance as both alleles have expressed equally in the F1. In case of dominance, out of the two alleles controlling the expression of the character, only one allele is expressed in the F1 generation.
Crossing two organisms which differ in two characters is called a dihybrid cross. As only one character is discussed in the question, it cannot be an example of dihybrid cross.
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