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olganol [36]
3 years ago
8

Explain incomplete dominance, using snapdragon flowers as an example.

Biology
2 answers:
viktelen [127]3 years ago
5 0

incomplete dominance. A heterozygous condition in which both alleles at a gene locus are partially expressed and which often produces an intermediate phenotype.

(google)

or

when the phenotype of the heterozygous phenotype is distinct from and often intermediate to the phenotypes of the homozygous phenotypes.

(my class book)

so, the snapdragon flower's color is homozygous for red or white

sorry it took a while :p


Nonamiya [84]3 years ago
4 0

Well incomplete dominance is a form of intermediate inheritance in which one allele for a specific trait is not completely expressed over its paired allele. And a example of this is a snap-dragon flower that is pink from cross pollination between a red and a white flower when neither the red or white flower are dominant.

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Flower color in snapdragons results from the amount of the pigment anthocyanin in the petals. Red flowers are produced by plants
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Answer:

The genotypes found in the F2 offspring will be An1An1, An1An2 and An2An2.

Explanation:

In the example given in the question, the color of the petals of snapdragon flowers are given with the An1 allele having full activity and the An2 allele being the null allele. For the F1 offspring, two snapdragon flowers are crossed, one with red petals which is An1An1 and one with ivory petals which is An2An2. All the genotypes for the F1 offspring will result in An1An2.

Then using this F1 offspring, the F2 offspring is found and the genotype of the F2 offspring will be An1An1 / An1An2 / An1An2 / An2An2.

So the genotypes found in the F2 offspring will be An1An1, An1An2 and An2An2. One red petal snapdragon, 1 ivory snapdragon and 2 pink snapdragons.

I hope this answer helps.

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