What cross will result in half homozygous dominant offspring and half heterozygous offspring? What cross will result in all heterozygous offspring?

In chickens, the Leghorn variety has white feathers due to an autosomal dominant allele. Silkies have white feathers due to a recessive allele in a second (different) gene. If a true-breeding whiteLeghorn is crossed to a true-breeding white Silkie, what is theexpected phenotype of the F1 generation? If members of the F1generation are mated to each other, what is the expected phenotypic ratio of the F2 generation? Assume the chickens in the parental generation are homozygous for the white allele at one gene andhomozygous for the brown allele at the other gene. In subsequentgenerations, nonwhite birds will be brown.

You are working with a hypothetical fly and have found color and wing mutants. Preliminary work indicates that the mutant traits are recessive and the associated genes are not sex-linked, but beyond that, you have no information. You first look at 2 genes, each with 2 alleles. "B" or “b" for body color and "W" or "w" for wing surface. The red-body phenotype is dominant to the yellow-body phenotype and smooth wings are dominant to crinkled wings.

Ragweed hay fever (R) is dominant to the lack of allergy (r). A man who doesn’t suffer from ragweed hay fever marries a woman who does suffer from this allergy. Her mother didn’t suffer from the allergy but her father as a homozygous dominant did. Fill in the chart below, then show the punnett square cross of the man and wife and state the genotypic ratio of the offspring. a) what is man phenotype and genotype? b) what is wife’s phenotype and genotype? c) what is wife’s mother phenotype and genotype? d) what is wife’s father phenotype and genotype?

In pea plants, the gene for green pod color is dominant over yellow. In terms of shape, inflated is dominant over wrinkled. If one parent was homozygous for green, inflated pods while the other parent was homozygous for yellow, wrinkled pea pods, what would be the genotypic and phenotypic ratios of the first filial generation or F1? Legend:G- green-colored podI- inflated peapodg- yellow-colored podi- wrinkled pea pod Question:  1. what are the genotypes of the parents  2. What are the possible genes that can be contributed by each parent? 3. Complete Punnett square

In four o’clock(a type of flowering plant), red color flowers exhibit incomplete dominance over white; when both exist together, the flowers are pink a) in a cross between a red flower and a white one, what is the genotype of the offspring? b) what is the genotypes ratio of the F2 generation of two of the F1 from (a) are crossed?

COU f) What kind of offspring can be produced if a red-flowered plant is crossed with a pink-flowered plant? Show your work. g) What kind of offspring is/are produced if a pink-flowered plant is crossed with a white-flowered plant? Show your work. hleod

In fruit flies, the allele for normal wings (V) is dominant to the allele for short wings (v). Suppose two fruit flies heterozygous for the trait are mated.   What is the male fruit fly’s genotype and the female fruit fly’s genotype?   What is the male fruit fly’s phenotype and the female fruit fly’s phenotype?   What will be the genotypic ratio of the F1 generation?   What will be the phenotypic ration of the F1 generation?

The allele A is brown fur and the allele a is white fur. In a mating between a heterozygous male and a heterozygous female, what is probability that they will have an offspring with brown fur and what is the probability they will have an offspring with white fur?

In guinea pigs, the gene for black coat color is dominant to the gene for white coat color. What will be the genotypic ratio for the cross between two heterozygous parents?