In a certain plant, the orange flower allele (Y) is dominant to the yellow flower allele (y). An allele that prevents flower color pigment formation (W) results in white flowers irrespectively of the Y and y alleles, and is dominant to an allele (w) that allows flower color formation. What is the expected proportion of phenotypes in the offspring of a cross between two dihybrid white-flower plants?   1/3 white flowers, 1/3 orange flowers, 1/3 yellow flowers 9/16 white flowers, 3/16 orange flowers, 3/16 yellow flowers, 1/16 orange-yellowish flowers 12/16 white flowers, 3/16 orange flowers, 1/16 yellow flowers 6/8 white flowers, 1/8 orange flowers, 1/8 yellow flowers 1/2 white flowers, 1/4 orange flowers, 1/4 yellow flowers

Dihybrid Cross In garden pea plants, tall plant height (T) is dominant to dwarf plant height (t) and the trait for axial flower position (F) is dominant to terminal flower position (f). If two plants, both with the genotype. TtFf are crossed, what is the phenotypic ratio for the offspring?

In a dihybrid cross of two bi-allelic Mendelian genes, A (two alleles – completely dominant A and recessive a), and B (two alleles – completely dominant B and recessive b), such that the parental generation comprises of pure-bred homozygotes (i.e. AABB with aabb), what are the expected genotype and phenotype ratios in the F1 and F2, if the F1 cross is (a) an intercross and if the F1 cross is (b) a testcross

With the same setting as the previous problem, in a cross between two BbCc parents, given that an offspring has black coat color and straight fur, what's the probability that it is heterozygous for both genes? Give 2 digits past the decimals.

Assume that the length of a type of cucumber at maturity is controlled by two genes (A and B), each of which has two alleles. The A and B alleles each add 3 inches of cucumber growth, while the a and b alleles add only 1 inches. If a plant with genotype Aabb is crossed to a plant with genotype AaBb, what ratios of lengths are expected in the progeny?     1/8-12”, 3/8-10”, 3/8-8”, 1/8-6”     1/2-8”, 3/8-6”, 1/8 4”     1/8-10”, 3/8-8”, 3/8-6”, 1/8-4”     1/2-12”, 3/8-10”, 1/8 8”     1/2-10”, 3/8-8”, 1/8 6”

Two true-breeding varieties of maize, one 11 cm high and the other 47 cm high were crossed and the resultant F1 hybrids were then crossed to generate the F2. In the F2 there were a total of 13,923 plants with a continuous variation in heights between the two extremes and with only 3 plants as large as 47 cm high and 5 plants of 11 cm high. In a cross between a 29cm plant and a 20cm plant what would be the genotypes giving the smallest number of different phenotypes? specify the phenotypes observed.

A is dominant over a and B is dominant over b. Genes A/a and B/b assort independently. The parental cross (P) is between true- breeding (homozygous) strains (AA bb x aa BB). The resulting F1 offspring would be [Select ] A F1 x F1 cross gives the F2 generation. The ratio of phenotypes in the F2 generation can be described as [ Select ] In the phenotypic ratio, what number refers to individuals that are: dominant for both traits? [ Select ] recessive for both traits? [Select ] To what phenotypes do the "3"s in the ratio refer? [ Select ] > >

In flowers, purple flower color is dominant and denoted by "P" while white flower color is recessive and is denoted by "p". In a monohybrid cross between 2 heterozygous purple flowers, what is the expected phenotypic offspring ratio?

In a certain plant, the dominant form of gene B codes for blue fruit, while the recessive form results in pink fruit. The dominant form of another gene, E, inhibits the activity of the enzyme coded for by gene B, resulting in white fruit, while the recessive form is unable to inhibit this enzyme and results in colored (i.e., blue or pink) fruit. A doubly-homozygous dominant white-fruited plant is crossed with a pink-fruited plant. The F1 progeny were then self-crossed to generate the F2 generation. Determine the ratios of genotypes and phenotypes for each generation.

The genes for tall vine, D, and yellow seeds, G, are dominant over their respective alleles for dwarf, d, and green, g. What phenotypes and genotypes are expected from each of the following crosses? Include phenotypic and genotypic ratios. 6. a) heterozygous tall, homozygous yellow x homozygous tall, heterozygous yellow b) dwarf, heterozygous yellow x heterozygous tall, green c) homozygous tall, homozygous yellow x heterozygous tall, green d) heterozygous tall, heterozygous yellow x heterozygous tall, heterozygous yellow