Suppose that in plants, smooth seeds (S) are dominant to wrinkled seeds (s) and tall plants (T) are dominant to short plants (t). A tall plant with smooth seeds was backcrossed to a parent that was short and wrinkled. What proportion of the progeny is expected to be heterozygous for tall and smooth?
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- Suppose that in plants, smooth seeds (S) are dominant to wrinkled seeds (s) and tall plants (T) are dominant to short plants (t). A tall plant with smooth seeds was backcrossed to a parent that was short and wrinkled. What proportion of the progeny is expected to be heterozygous for tall and smooth?
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- Suppose that goats have one gene that codes for color, where A is brown and a is white. The goats also have another gene that codes for height, where B is tall and b is short. If these two genes are unlinked, what is the probability that a cross between Aa Bb × Aa bb parents will produce two out of six offspring that are brown and short? Provide answer as a decimal, rather than as a percentage.Suppose that for three generations, the clawed wing trait has only shown up in males. In the fourth generation, a mating between a clawed wing male and a normal wing female produces a clawed wing female. Does this necessarily mean that the trait is not sex-linked? Why or why not? (Sketching out a quick pedigree may help you answer)what will be the offspring if the white grapefruit tree is heterozygous?
- in classical genetics what is the expected phenotypic ratio for progeny having a characterirstic such as plant height being controlled by a single gene? how about being controlled by two different genes?Suppose that goats have one gene that codes for color, where A is brown and a is white. The goats also have another gene that codes for height, where B is tall and b is short. If these two genes are unlinked, what is the probability that a cross between Aa Bb × Aa bb parents will produce three out of five offspring that are white and tall? Enter your answer as a decimal, rather than as a percentageIn watermelons there is a gene for colour and a gene for shape located on different chromosomes. The alleles for green colour and for short shape are dominant over their alleles for striped colour and for long shape. Suppose a plant with long striped fruit is crossed with a plant heterozygous for both these characters. What phenotypes would this cross produce and in what ratios?
- Suppose that the short allele is a meiotic drive gene, and 80% of the gametes from a heterozygous individual with tall and short alleles contain short alleles. If tall is dominant to short, what percent of individuals from a cross between a heterozygous tall individual and a homozygous recessive individual will be tall?Using the pedigree chart shown answer question . What is the likelihood that the progeny of IV-3 and IV-4 will have a widow’s peak?Suppose you have an AAaa tetraploid plant and it undergoes self-fertilization. At least two copies of thedominant allele A are needed to obtain the dominantphenotype. At what frequency will progeny with thedominant phenotype appear?
- Suppose you have an AAaa tetraploid plant and it undergo self- fertilization. At least two copies of the dominant allele A are needed to obtain the dominant phenotype. At what frequency will progeny with the dominant phenotype appear?If you crossed a heterozygous fruit fly with straight wings and red eyes to one with curly wings/white eyes, what is the phenotypic ratio of their offspring?Suppose in a strain of soybeans, high oil (H) content in the seeds is dominant to low oil content and four seeds (E) in a pod is dominant to two seeds in a pod. A farmer crosses two soybean plants, both with high oil content and four seeds per pod. The resulting F1 offspring have a phenotypic ratio of 9:3:3:1 (High oil/four seeds: High oil/ two seeds: Low oil / four seeds : Low oil / two seeds). What genotype were the parent plants?