**Educational Content: Mendel’s Dihybrid Cross Experiment****Question:** In Mendel’s classic dihybrid cross experiment with seed color and seed shape, what would the recombination frequency have been in the F₂ offspring? Refer to Figure 9.16 on page 175 of your textbook if you need a visual.**Graph/Diagram Explanation:** The diagram illustrates the process of meiosis and fertilization in Mendel’s dihybrid cross, focusing on two traits: seed color and seed shape.1. **F₁ Generation:** - All plants with yellow round seeds, genotype RrYy.2. **Meiosis I:** - Two equally probable arrangements of chromosomes occur at metaphase I, leading to variation in gametes.3. **Meiosis II:** - The combination of alleles in gametes is shown, resulting in four possible gametes: RY, Ry, rY, and ry.4. **Fertilization Among F₁ Plants:** - Fertilization between F₁ gametes results in the F₂ generation with varied combinations of phenotypes and genotypes, illustrated by a Punnett square.5. **Punnett Square:** - The different combinations of gametes are shown, resulting in a 9:3:3:1 phenotypic ratio: - 9/16 Yellow round - 3/16 Green round - 3/16 Yellow wrinkled - 1/16 Green wrinkled**Answer Options:**a. 0% b. 25% c. 100% d. 18.8% This visual and explanation help illustrate how Mendelian principles of inheritance predict the outcome of genetic crosses.

In Mendelian dihybrid cross the parantal phenotype is pure yellow round seed and pure green wrinkled seed. In F2 generation 4 types of phenotype are produce. Recombine genotyoe and there frequency is describe bellow. Phenotypic ratio of the F2 generation is 9:3:3:1. Yellow round seed =9, green round=3, yellow wrinkled =3, green wrinkled =1. Here yellow round and green wrinkled is the parental characteristics and green round and yellow wrinkled is the recombinant type. So the total recombinant characteristics = 316+316=616=168 Recombinant frequency =316×100=18.8 So the correct answer is option (d)18.8%

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Biology

In Mendel's classic dihybrid cross experiment with seed color and seed shape, what would the recombination frequency have been in the F, offspring? Refer to Figure 9.16 on page 175 of your textbook if you need a visual. 7. F, generation Sperm All yellow round seeds (RrYy) 10 FRYY RYY RRY RY RYY YY R Yy Rr Eggs Two equally probable arrangements of chromosomes at metaphasel Meiosis I4 PRy Roy 10 Ry Yy Rryy my 9 Yellow 16 round 3 Green 16 round Anaphase I 3 Yellow 1o wrinkled To wrinkded 1 Green Metaphase II Mejopis Il4 Gametes la Fir Ry Fertilization among the F, plants To ro F2 generation 9 me a. 0% b. 25% c. 100% d. 18.8%

In Mendel's classic dihybrid cross experiment with seed color and seed shape, what would the recombination frequency have been in the F, offspring? Refer to Figure 9.16 on page 175 of your textbook if you need a visual. 7. F, generation Sperm All yellow round seeds (RrYy) 10 FRYY RYY RRY RY RYY YY R Yy Rr Eggs Two equally probable arrangements of chromosomes at metaphasel Meiosis I4 PRy Roy 10 Ry Yy Rryy my 9 Yellow 16 round 3 Green 16 round Anaphase I 3 Yellow 1o wrinkled To wrinkded 1 Green Metaphase II Mejopis Il4 Gametes la Fir Ry Fertilization among the F, plants To ro F2 generation 9 me a. 0% b. 25% c. 100% d. 18.8%

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter3: Transmission Of Genes From Generation To Generation

Section: Chapter Questions

Problem 27QP

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Genetic Variation

Genetic variation refers to the variation in the genome sequences between individual organisms of a species. Individual differences or population differences can both be referred to as genetic variations. It is primarily caused by mutation, but other factors such as genetic drift and sexual reproduction also play a major role.

Quantitative Genetics

Quantitative genetics is the part of genetics that deals with the continuous trait, where the expression of various genes influences the phenotypes. Thus genes are expressed together to produce a trait with continuous variability. This is unlike the classical traits or qualitative traits, where each trait is controlled by the expression of a single or very few genes to produce a discontinuous variation.

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