1. 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? 2. Sickle cell anemia is a recessive trait in humans. In a cross between a father who has sickle cell anemia and a mother who is heterozygous for the gene, what is the probability that their first three children will have the normal phenotype?

1. 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? 2. Sickle cell anemia is a recessive trait in humans. In a cross between a father who has sickle cell anemia and a mother who is heterozygous for the gene, what is the probability that their first three children will have the normal phenotype?

Name: 1. Suppose that in plants, smooth seeds (S) are dominant to wrinkled s
Uploaded: 2024-03-20T06:43:04.000Z
Channel: Bartleby
Description: 1. 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 progen

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter12: Mendel's Experiments And Heredity

Section: Chapter Questions

Problem 7RQ: Imagine you are performing a cross involving seed color in garden pea plants. What Fi offspring...

See similar textbooks

Similar questions

The following pedigree shows the pattern of inheritance of red green color blindness in a family. Females are shown as circles and males as squares; the squares or circles of individuals affected by the trait are filled in red. What is the chance that a son of the third-generation female indicated by the arrow will be color-blind if the father is a normal man? If the father is color-blind?
The dominant C allele of a gene that controls color in corn produces kernels with color; plants homozygous for a recessive c allele of this gene have colorless or white kernels. What kinds of gametes, and in what proportions, would be produced by the plants in the following crosses? What seed color, and in what proportions, would be expected in the offspring of the crosses? a. CCCc b. Cccc c. CcCc
Imagine you are performing a cross involving seed color in garden pea plants. What Fi offspring would you expect if you cross true-breeding parents with green seeds and yellow seeds? Yellow seed color is dominant over green. 100 percent yellow-green seeds 100 percent yellow seeds 50 percent yellow, 50 percent green seeds 25 percent green, 75 percent yellow seeds
1. Hereditary deafness in dalmations (d) is a recessive trait. What percentage of the progeny of crossing DD × Dd will be expected to be a carrier of the deafness allele, but not deaf? (enter a number only) 2.In snapdragons, a flowering plant, red (R) flower colour is dominant to white (r). The heterozygous condition results in pink flower colour. If a two pink flowered snapdragons are crossed, what is the resulting phenotype ratio? Select one: a.2:2 b.1:1:1:1 c.1:2:1 d.3:1 e. (all will be the same)
5. In corn, kernel color is controlled by Gene K, with the dominant K allele producing colorful kernels and the recessive k allele producing colorless kernels. Likewise, plant color is controlled by Gene P, with the dominant Pallele producing green plants and the recessive p allele producing yellow plants. Suppose you cross a heterozygous corn plant with a homozygous recessive corn plant. a. Write the genotypes of the parents in the cross. b. Write the possible gametes produced by the heterozygous parent. c. Write the possible gametes produced by the homozygous parent. d. Fill in the following table: Possible heterozygote gametes Possible offspring genotypes (if crossed to homozygous recessive) Possible offspring phenotypes
11. Mendel crossed peas having round seeds and yellow cotyledons with peas having wrinkled seeds and green cotyledons. All the F1 plants had round seeds with yellow cotyledons. a. What are the genotypes of the parent plants? b. What gametes could be produced by the parent with round seeds and yellow cotyledons? T C. What gametes could be produced by the parent with wrinkled seeds and green cotyledons?
5. In corn, kernel color is controlled by Gene K, with the dominant K allele producing colorful kernels and the recessive k allele producing colorless kernels. Likewise, plant color is controlled by Gene P, with the dominant P allele producing green plants and the recessive p allele producing yellow plants. Suppose you cross a heterozygous corn plant with a homozygous recessive corn plant. a. Write the genotypes of the parents in the cross. b. Write the possible gametes produced by the heterozygous parent. C. Write the possible gametes produced by the homozygous parent. d.. Fill in the following table: Possible offspring phenotypes Possible offspring genotypes (if crossed to homozygous recessive) Possible heterozygote gametes
1. Imagine you have crossed a pure breeding purple flower and pinched pod shape pea plant with a pure breeding white flower and round pod shape pea plant. What would the phenotype be with respect to the flower color and the pod shape in the F1 generation? ” 2. If one of the F1 was allowed to cross-fertilize, what would be the possible phenotypes in the F2 and how many of each phenotype would you predict out of a total of 200 F2 progeny?”
15. Albinism in corn plants is caused by a recessive lethal gene that results in death before maturity. What will the adult phenotypic ratio be for the F1 generation of heterozygous parents? 16. Huntington's chorea is a dominant lethal in humans. The disease does not appear until later in life, so that afflicted individuals may already have produced children. What are the F1 genotypic and phenotypic ratios of parents who are homozygous dominant and heterozygous?
18. In tomatoes, tall (D) is dominant over dwarf (d), and smooth fruit (P) is dominant over pubescent (p) fruit, which is covered with fine hairs. A farmer has two tall and smooth tomato plants, which we will call plant A and plant B. The farmer crosses plants A and B with the same dwarf and pubescent plant and obtains the following numbers of progeny: Dd Pp Dd pp dd Pp dd pp Progeny of Plant A 122 6 4 124 a. What are the genotypes of plant A and plant B? Indicate what are the alleles on each chromosome Plant B 2 82 82 4 b. Are the loci that determine height of the plant and pubescence linked? If so, what is the percent recombination between them? Use chi-square test: 1) what is your hypothesis; 2) what are the expected results based on your hypothesis; 3) how to calculate chi-square; 4) what is the degree of freedom; 5) what is the p-value, and 6) what is your conclusion (what does the p-value mean) If these two genes are linked, calculate the recombinant frequency. c. Explain why…
1. Two normal visioned parents have a color-blind son. Give the genotype of both parents and the son. 2. In cats, the allele (B) produces black color but (b) produces a yellow color. These alleles are incompletely dominant to each other. A heterozygote produces a tortoise shell color. The alleles (B) and (b) are sex-linked as well. Cross a tortoise shell female with a yellow male. a. What percent of their offspring will be yellow? b. What percent of their offspring will be black? c. What percent of their offspring will be tortoise shell? d. Why is it impossible to have a tortoise shell male offspring?
7. A cross between a red-flowered plant and a blue-flowered plant results in a Identify the type of non-Mendelian genetics described. Write A on the blank if the item describes incomplete dominance, B if it describes codominance, and C if the item describes multiple alleles. 1. It is also known as blended inheritance because neither of the genes is able to mask the other. a 2. The offspring has both alleles and both are equally dominant. 3. The genes contain three or more alleles. 4. A cross between a red-flowered plant and a blue-flowered plant results violet-flowered plant. 5. More than two alleles can code for a gene. 6. It is a gene expression in which the phenotype of the heterozygous individual is intermediate between those of the parents. plant with red and blue flowers.