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Incomplete dominance:

In carnations red color is dominant and white is recessive. Dominance is incomplete, with heterozygous individuals being pink. Cross a pure red plant with a pure white plant. What is the appearance of the F1 generation? Allow the F1 generation to interbreed freely. What will be the appearance of the F2 generation?

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Collen Von
Collen VonLv2
28 Sep 2019

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Related questions

Hi I am studying for a biology exam and I have some questionsthat are on a review sheet that i am unsure about


1. In Tomatoes, the allele for red fruit is dominant over theallele for yellow fruit. If a plant that is homozygous for redfruit is crossed with a plant with yellow fruit รขย€ย“

a) what is/are the genotype(s) and the phenotype(s) of the fruitproduced in the F1 generation?

b) what is/are the genotype(s) and the phenotype(s) of the fruitproduced in the F2 generation?

c) what is the phenotypic ratio of the F2 fruit?


2. A plant with red flowers is crossed with a plant with whiteflowers. All the F1 plants produced red flowers. When the F1 plantsare allowed to self-pollinate, they produce 623 plants with redflowers and 198 plants with white flowers. What are the genotypesof the P and F1 generations?

3. In Tomatoes, the allele for red fruit isdominant over the allele for yellow fruit. Theallele for tall plants is dominant of the allele forshort plants. Find the genotypes and phenotypes ofthe F1 and F2 generations and the phenotypicratio of a cross between a homozygous dominant in both genes and ahomozygous recessive in both genes. The homozygous individuals arethe Parental generation.

4. In cocker spaniels, solid coat color is dominantover spotted coat. A veterinarian has a spaniel with a solidcoat. How can she unequivocally determine the genotype of thisanimal for coat color from a single breeding?

The white eye mutation studied by Thomas Hunt Morgan is X-linkedand recessive to wild-type red eyes. When true-breeding white-eyedmales carrying the white mutation were crossed with true-breedingpurple-eyed females, all the F1 progeny had wild-type (red) eyes.When the F1 progeny were intercrossed, the F2 progeny emerged inthe following ratio:

3/8 wild-type females
1/4 white-eyed males
3/16 wild-type males
1/8 purple-eyed females
1/16 purple-eyed males.

Formulate a hypothesis to explain the inheritance of these eyecolors and match the correct genotype with each individual listedbelow.

P Generation Male:

P Generation Female:
F1 Generation Male

F1 Generation Female:

F2 Generation Purple-eyed Female

F2 Generation White-eyed Male

F2 Generation Wild-type Male:

F2 Generation Purple-eyed Male:

F2 Generation Wild-type Female:

Options:

w+/Y; p+/_

w/Y;_ _

w+/_; p/p

w+/Y;p+/p

w+/_;p+_

w/Y; p+/p+

w+/W+; p/p

w+/Y; p/p

*The normal color of snapdragons is red. Some pure lines showing variation in flower color have been found. Analyze the following crosses and do the following:2

Explain the inheritance of these colors (include number of genes, alleles and dominance relationships).

Determine the genotypes of the parents and the F1 of each cross.

Propose a biochemical pathway for flower color production in snapdragons.

Parents F1 F2

1. orange x yellow orange 3 orange: 1 yellow

2. red x orange red 3 red: 1 orange

3. red x yellow red 3 red: 1 yellow

4. red x white red 3 red: 1 white

5. yellow x white red 9 red: 3 yellow: 4 white

6. orange x white red 9 red: 3 orange: 4 white

7. red x white red 9 red: 3 yellow: 4 white

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