Part C: Monohybrid Cross Problems - Make a punnett square to show your work. 15. Green leaf begonia plant (G) is dominant over (g), a red leaf begonia plant. A heterozygous green leaf begonia plant is mated with a homozygous red leaf begonia plant. What will be the genotype and phenotype of the offspring? Determine the genotypic and phenotypic ratios, Genotypes: Phenotypes: Genotypic Ratio: Phenotypic Ratio: 16. In tomatoes, red fruit (R) is dominant over yellow fruit (r). A plant that is homozygous for red fruit is crossed with a plant that has yellow fruit (Think here).... What will be the genotype and phenotype of the offspring? Genotypes: Phenotypes: Genotypic Ratio: Phenotypic Ratio:
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Step 1: For question 15, the genotype of the heterozygous green leaf begonia plant is Gg, and the genotype of the homozygous red leaf begonia plant is gg. Show more…
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Instructions: Students will need to show all work including writing out the crosses and the resulting gametes as well as Punnett squares. The final responses need to be marked with a box or circle around them. 1a) Mendel determined that yellow seeds is dominant to green seeds in peas. Cross a pea plant which is homozygous for yellow seeds with one which has green seeds. (Use capital letters for the dominant trait and the same letter in lower case for the recessive trait). What is the expected genotypic ratio of the offspring (F₁)? What is the expected phenotypic ratio? 1b) If the F₁ plants in the previous problem were allowed to self-fertilize, what is the expected genotypic ratio in the F₂? What is the expected phenotypic ratio? Show the problem. 2) In summer squash, yellow fruit color dominates over white. A white-fruited plant is crossed with a yellow-fruited one and produced 51 white and 49 yellow fruited plants.
Jackson M.
Monohybrid Practice Problems. For each of the following, show the Punnett Square and give the Genotype AND Phenotype for each on your own paper. In humans, brown eyes are dominant over blue eyes. What type of offspring would you expect if you crossed a heterozygous brown-eyed person to a heterozygous brown-eyed person? 2. A widow's peak hairline is dominant to a straight hairline. Cross a heterozygous widow's peak hairline person to a straight hairline person. In humans, premature gray hair is dominant over normal hair coloring. Cross a homozygous premature gray-haired person to a homozygous normal-haired person. In humans, tongue rolling is dominant to non-tongue rolling. What would be the expected type of offspring if a homozygous tongue roller was crossed to a heterozygous tongue roller? Brown hair is dominant over light-colored hair. Cross two light-haired people. In a certain plant, yellow fruit is dominant to white fruit. A heterozygous plant with yellow fruit is crossed with a plant with white fruit. Determine the probable offspring. In a certain animal, black fur is dominant to white fur. Determine the possible offspring from crosses between: a. Homozygous black x white b. Heterozygous black x heterozygous black In garden peas, round peas are dominant to wrinkled peas. If you crossed a homozygous dominant and homozygous recessive, what would be the genotype and phenotype of the offspring? 9. In corn, normal kernels are dominant to waxy kernels. If you crossed a waxy kernel plant to a heterozygous normal plant, what type of seeds would be produced? 10. Tall plants are dominant to short plants in the garden pea plant. Cross a heterozygous tall plant to a heterozygous tall plant.
Shaiju T.
Genetics' Problems: DOMINANT/RECESSIVE TRAITS: Draw Punnett squares and show your work 1) Tall pea plants are dominant over short pea plants. Draw and fill in the Punnett square and determine the expected genotypic and phenotypic ratios from crossing heterozygous and heterozygous dominant parents. Genotype ratio: Phenotype ratio: 2) The axial flower position is dominant over the terminal flower position. Draw and fill in the Punnett square and determine the expected genotypic and phenotypic ratios from crossing heterozygous and homozygous dominant parents. Genotype ratio: Phenotype ratio: 3) Gray seed coat color is dominant over white seed coat color. Draw and fill in the Punnett squares and determine the expected genotypic and phenotypic ratios from crossing homozygous dominant and homozygous dominant parents. Genotype ratio: Phenotype ratio: 4) Tall pea plants are dominant over short pea plants. Draw and fill in the Punnett square and determine the expected genotypic and phenotypic ratios from crossing homozygous recessive and homozygous recessive parents. Genotype ratio: Phenotype ratio:
Madhur L.
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