Codominance occurs when Select one: A. both of the alleles in a heterozygote are equally expressed phenotypically in an individual. B. offspring exhibit several different phenotypic expressions of a single trait. C. expression of two different alleles alternates from one generation to the next. D. a heterozygote expresses an intermediate phenotype.
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- What is complete dominance A) When one Allele produces the phenotypic expression. B) When two Alleles produce the phenotypic expression. C) When all Alleles produce the phenotypic expression.A) what are the genotypes for EB27 and EB67? B) what is the relationship between the three alleles (B,br, y)? Show evidence using the pedigreeIn certain species of flies, eye color is controlled by sim-·ple dominance by a single pair of alleles. A red-eyed fly was crossed with a white-eyed fly, both of whose parents had white eyes. All of their offspring (both female and male) had red eyes.a. Which is dominant, the allele for red eyesor the allele for white eyes?b. What is the genotype of the white-eyed parents?c. If the white-eyed parent was mated with one of the red-eyed offspring, what phenotypic ratio wouldyou expect regarding eye color?
- Please follow instructions from pic above Red roan hair colour in some horses is due to codominance of the white allele and the red allele. If a red roan horse mates with a white horse, indicate the genotypic and phenotypic ratios that would result.Red flowers are dominat to white flowers, and tall stems are dominant to short stems. A plant that is homozygous for red flowers and heterozygous for height is crossed with a plant that is heterozygous for both traits. a) show the alleles for both traits, using proper notation b) Possible genotypes for red flowers, and for white flowers c) Possible genotypes for tall plants, and for short plants d) give the full genotypes for each plant e) give the possible gametes for each plant f) give the phenotype ration of the offspring_______in a trait is indicated by a bell curve. a. An epigenetic effect c. Incomplete dominance b. Pleiotropy d. Continuous variation
- Codominance results in: a. sometimes dominance, sometimes resessiveness b. joint expression of two alleles c. none of the above d. intermediate expression of two allelesWhich of the following statements correctly describes a Y-linked trait? A. It will always be expressed if present in female individuals B. It can be inherited by a daughter for her father C. It can be inherited by a son from his mother D. It will always be expressed if present in male individualsFruit flies are very useful model organisms that have been used to study genetics. One mutant recessive trait in fruit flies is called "eyeless" because it causes flies to have no eyes. Cross an eyeless fly with a homozygous normal fly. a. Draw the Punnett square. b. What is the genotyoe ratio of the offspring? c. What is the phenotype ratio of the offspring? d. What genetic problem is this? (monohybrid, dihybrid or multiple allele)
- Please use instructions from above Red roan hair colour in some horses is due to codominance of the white allele and the red allele. If a red roan horse mates with a white horse, indicate the genotypic and phenotypic ratios that would result.A true breeding plant that produces elongated fruits is crossed to a true breeding plant that produces round fruits. The offspring of this cross all have oval-shaped fruit. Which of the following is true? A. This involves two genes, one that controls the length of the fruit and one that controls the width. B. This long allele is epistatic over the short allele. C. The long allele is dominant over the short allele. D. The long allele is incompletely dominant over the short allele.In a mating between two individuals that are heterozygous for a recessive lethal allele that is expressed in utero, what genotypic ratio (homozygous dominant:heterozygous:homozygous recessive) would you expect to observe in the offspring? a. 1:2:1 b. 3:1:1 c. 1:2:0 d. 0:2:1