P Generation F, Generation F, Generation 1. What trait is being studied in the cross pictured above? 2. There are 2 alleles for the trait. What are they? 3. Which allele is the recessive allele? Explain why.
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- Topic: Penetrance. Petal number is controlled by a single gene in merigonias. The gene has a completely dominant wild type allele F that makes a plant have five petals and a mutant recessive six petal allele(f). However the six petal trait is only 50% penetrant. You do the cross Ff x Ff. What fraction of the progeny do you have the 6 petals? what is the meaning for 50% penetrant.Genetics I LAB 11 Onion Genetics Part 1. We will begin by looking at onion color. Let's arbitrarily assign the letter "R" for color and say red onions are dominant (R) and white onions are recessive (r). Cross an individual who is heterozygous with an individual who is homozygous recessive. 1. What is the genotype of the heterozygous individual? 2. What is the genotype of the homozygous recessive individual? Complete the Punnett square using the alleles you just listed. 3. What are the resulting genotypes and their ratios or %? 4. What are the resulting phenotypes and their ratios or %?. Jimsom. weed plants can produce purple or white flowers and spiny or smooth seed pods. A purple spiny plant is crossed with a white spiny plant. This cross produces: 89 purple spiny; 92 white spiny; 31 purple smooth and 27 white smooth plants. What are the genotypes of the parental plants and the progeny plants? Use the letters P/p for flower color and S/s for pod texture Parent #1 –genotype:_________________________________; Parent #2 –genotype: ______________________________ b. Offspring plants – genotypes and phenotypes c. Calculate the recombination frequency using these results_________________________________ i need help finding the right answer and i need an explation on how you got it so i understand and please do it with a punnet square and show the calutions step by step
- Practice with Crosses. 5. A TT (tall) plant is crossed with a tt (short plant). What percentage of the offspring will be tall? 6. A Tt plant is crossed with a Tt plant. What percentage of the offspring will be short? What percentage is tall? 7. A heterozygous round seeded plant (Rr) is crossed with a homozygous round seeded plant (RR). What percentage of the offspring will be homozygous (RR)? 8. A homozygous round seeded plant is crossed with a homozygous wrinkled seeded plant. What are the genotypes of the parents? What percentage of the offspring will also be homozygous? I also What is the genotype of all of the offspring? 9. In pea plants purple flowers are dominant to white flowers. If two white flowered plants are cross, what percentage of their offspring will be white flowered? 10. A white flowered plant is crossed with a plant that is heterozygous for the trait. What percentage of the offspring will have puple flowens? 11. Two plants, both heterozygous for the gene that controls…11:50 1 Drive Dihybrid cross (two-trait crosses-each has two varieties) 4. A plant heterozygous for stem height and homozygous dominant for flower color is crossed with another plant recessive for both traits. What will the ratio of offspring be in the F1 generation? What genotypes in a parental generation will produce a 9:3:3:1 phenotypic ratio in offspring? Show your work. 5. A pure breeding, spherical yellow plant is crossed with a pure-breeding dented green plant. What will be the genotypic and phenotypic ratios in the F1 and F2 generations? 6. Which lawe Mnd his oss illustrate?Part 1: Mendelian Genetics 1. For each of the genotypes Purple Flowers are Dominant to white flowers PP - Purple Pp - Purple pp-White Straight hair is dominant to curly hair below, list all possible phenotypes. Brown eyes are dominant to blue eyes Straight - HH, Hh Curly - hh BB- Bb bb- 2. For each of the phenotypes below, list all possible genotypes. (Remember: use only 1 letter to designate a trait, big and small per scenario) Pointed heads are dominant to round heads Black fur is dominant to white fur Pointed - Round - FF - Ff- ff - Jagged leaves are dominant to smooth leaves Jagged - Smooth -
- Name Period into the genetics problem. Genetics Worksheet # 2 1. In pea plants, smooth peas (S) are dominant to wrinkled peas (s). Work the following crosses. a. homozygous dominant x recessive Genotypes: Phenotypes: Genotypic ratio: Phenotypic ratio: b. heterozygous x heterozygous Genotypes: Phenotypes: Genotypic ratio: Phenotypic ratio: 2, A man and his wife are both heterozygous for brown eyes (B). They have six children all of whom have blue eyes> How can this happen? List the genotypes of the parents and the children. Show the Punnett square. Parents: Kids: What is the chance that the next child will have blue eyes?For numbers 34-50. Given the following pedigree, answer the following questions. 1st generation would be the grandparents, 2" generation would be the children of the grandparents and the 3" generation would be the children of the 2"generation. Trait that would be track is autosomal dominant and recessive. Cleft chin (CC or Ce) = Dominant No cleft chin (ce) = Recessive II 10 34-37. What is the expected Genotype of the grandfather? A. CC В. Се С. се D. Either A or B 38-41. What is the expected genotype of number 4 given the following genes in the 1st generation A. CC В. Се C. Either A or B D. Neither A nor 8 42-45. Who are the persons failed to inherit cleft chin from the grand mother? A. Number 5, 1, 8,9 and 7 B. Number 2, 9, 7, 10 and 3 C. Number 2, 5, 7, and 9 D. Number 1, 3 and 10 E. Nurmber 2 and 5 47-50. If number 10 married a person without a cleft chin and all the off-springs have cleft chin, what is the genotype of number 10? A C В. Сс С. сс D. Either A nor B11 Normal No Spac. Styles Paragraph Inheritance APPLICATION Imagine that you are interested in developing a new tomato plant that will inchude the large size and sweetness from one parent and yellow color from another parent. The first parent plant has bland-tasting small yellow tomatoes and the other parent has sweet-tasting large red tomatoes. The chromosomes and alleles of the two plants are shown below. Plant #1: Bland (B), Small (1), Yellow (r) Plant #2: Sweet (b), Large (L), Red (R) R 1 r R Think about what you learned about inheriting traits from the lab to answer these questions. 1. Explain (in sentence form) why it is or is not possible for any of the offspring of these parents to have the sweet gene expressed in its phenotype. To illustrate your explanation, you may use a diagram or use the Punnett squares below to show the genotypes of the possible offspring. Include a percent chance in your answer. 2. Explain whether or not it is possible to create a tomato plant with…
- For numbers 34-50. Given the following pedigree, answer the following questions. 1st generation would be the grandparents, 2" generation would be the children of the grandparents and the 3" generation would be the children of the 2" generation. Trait that would be track is autosomal dominant and recessive. Cleft chin (CC or Ce) = Dominant No cleft chin (cc) = Recessive II II 10 42-45. Who are the persons failed to inherit cleft chin from the grand mother? A. Number 5, 1, 8,9 and 7 B. Number 2, 9, 7, 10 and 3 C. Number 2, 5, 7, and 9 D. Number 1, 3 and 10 E. Number 2 and 51 point Later on, you made a completely new cross. But you cannot remember the genotype from one of the parents. You are sure that one parent was (Ww). You remember your Bio class back in VCU and decided to check the ratios in the plants produced in this cross. If this cross (Ww X??) produced 140 plants, and 105 have purple flowers and 35 have white flowers. Then what is the genotype of the other parental? W=Purple color w=White color W is dominant ООО ww WW Ww You can assume W is dominant and we have complete Dominance with 100% Penetrance and Expressivity. WW 105 X 35Part 2: Non-Mendelian Genetics 6. For each of the genotypes below, list all possible phenotypes. Purple Flowers are dominant white flowers are recessive and heterozygous flowers are lavender. PP- Pp- pp Brown eyes are dominant, blue eyes are recessive, and heterozygous eyes are green. BB- Bb - bb- Black fur is dominant, white fur is recessive, and heterozygous fur is grey. FF - Ff- ff - 7. A woman with type A blood has a child with a man with type AB blood. Show ALL the possible crosses the child may have.