Solved by a verified expert:Lab 6: Genetic CrossesName: Marcus Bannister______________________________Lab section: ____________Lab Instructor’s name: Natasha LaMont_____________________Last 4 digits of your CUNYFirst Empl ID #: _____________Fall 2015Read Chapter 7 and print out the sample genetic cross posted below the lab onlaunchpad to use as a guide.Below is a list of the phenotypes used in this lab. These are all single gene traits thatshow complete dominance. Use this information to set up and analyze your crosses.TraitFlower colorPlant HeightSeed ShapeSeed ColorDominant phenotypePurple flowersTall plantsSmooth seedsYellow seedsRecessive PhenotypeWhite flowersShort PlantsWrinkled seedsGreen seedsPart I: Symbols and definitions:1. a) What is a gene? What is an allele? Give an example of 2 alleles of a human gene. (0.5pts)A gene is the basic physical and functional unit of heredity.Allele is one of a number of alternative forms of the same gene or same genetic locus.Attached earlobe allele and Window peak allele.b) What is the difference between an organism that is a homozygote and one that is aheterozygote? (0.25 pts)Heterozygote has two kind allele for specific-AaHomozygote organism has one kind allele for specific gene-AAc) What is the difference between an organism’s genotype and its phenotype? (0.25 pts)Genotype is an organism’s full hereditary information. For AA Phenotype is an organism’s actual observed properties, for example red-colored flowers2. For each trait in the table below, indicate ALL OF THE GENOTYPES that are possible. Usethe first letter of the dominant trait to indicate the trait (for example, use the letter P for purple).(2pts)TraitFlower colorPlant HeightSeed ShapeSeed ColorDominant genotype(s)Purple = AATall = BBSmooth = CCYellow = DDRecessive genotype(s)White = aaShort = bbWrinkled = ccGreen= ddPick three of the crosses to complete using any 3 of the last 4 digits of your CUNYFirst BCstudent Empl ID. If there are repeats, pick random numbers, so you are doing 3 differentcrosses. Circle the numbers of the crosses you are doing in column 1 below.You must pick 3 different crosses. If there are multiple repeated numbers in your ID, pickadditional numbers of your choice.CrossNumberMale parent traitsFemale parent traits0Heterozygous for flower colorHeterozygous for heightHomozygous dominant for flower colorHeterozygous for height1Heterozygous for flower colorHomozygous dominant for heightHeterozygous for flower colorHomozygous dominant for height2Heterozygous for flower colorHeterozygous for seed colorHeterozygous for flower colorHeterozygous for seed color3Homozygous recessive for flower colorHeterozygous for seed colorHomozygous dominant for flower colorHeterozygous for seed color4Homozygous recessive for seed shapeHomozygous recessive for heightHeterozygous for seed shapeHeterozygous for height5Heterozygous for seed shapeHeterozygous for heightHeterozygous for seed shapeHomozygous recessive for height6Homozygous dominant for flower color Homozygous recessive for flower colorHomozygous recessive for seed shapeHomozygous dominant for seed shape 7Heterozygous for flower colorHomozygous recessive for seed shapeHeterozygous for flower colorHomozygous recessive for seed shape8Heterozygous for seed shapeHeterozygous for seed colorHomozygous recessive for seed shapeHomozygous dominant for seed color9Heterozygous for seed shapeHomozygous recessive for seed colorHomozygous recessive for seed shapeHomozygous recessive for seed colorNow you can use the charts and Punnett squares on each of the following pages to completeyour crosses. Use the sample of a genetic cross posted on Launchpad directly below the labfor a guide in doing these crosses.Cross 1: Please write the number of the cross you are performing: __6____________Then fill in the genotype and phenotype for each parent below. Use the sample of a geneticcross posted on launchpad directly below the lab for a guide.SexGenotypePhenotypeMaleAaCcPurple Flowerand WrinkledseedFemaleAaCcWhite flowersand smooth seedStep 1: Determine the different gamete combinations that each parent can contribute to theoffspring. Check the hint from the sample problem when you are doing this.SexGamete 1Gamete 2Gamete 3Gamete 4MaleACAcaCac FemaleACAcaCadaCacStep 2: Fill in the Punnett Square belowMale gametesplace acrossACAcFemale Gametes:Place below: ↓ACAACCAACaAaCCAaCcAcAACaAAccAaCcAaccaCAaCCAaCcaaCCaaCaacAaCcAaccaaCdaaddStep 3: Find the Phenotype of each of the 16 combinations in your Punnett Square page.Phenotype you’ve found in offspringPurple flower, wrinkle seedPurple flower, smooth seedWhite flower, wrinkle seedWhite flower, smooth seedNumber of offspring with this phenotype Cross 2: Please write the number of the cross you are performing: _____1_________Then fill in the genotype and phenotype for each parent below.SexGenotypePhenotypeMaleFemaleStep 1: Determine the different gamete combinations that each parent can contribute to theoffspring.SexGamete 1Gamete 2MaleFemaleStep 2: Fill in the Punnett Square belowMale gametesplace acrossFemale Gametes:Place below: ↓Gamete 3Gamete 4 Step 3: Find the Phenotype of each of the 16 combinations in your Punnett Square page.Phenotype you’ve found in offspringNumber of offspring with this phenotype Cross 3: Please write the number of the cross you are performing: _____9_________Then fill in the genotype and phenotype for each parent below.SexGenotypePhenotypeMaleFemaleStep 1: Determine the different gamete combinations that each parent can contribute to theoffspring.SexGamete 1Gamete 2MaleFemaleStep 2: Fill in the Punnett Square belowMale gametesplace acrossFemale Gametes:Place below: ↓Gamete 3Gamete 4 Step 3: Find the Phenotype of each of the 16 combinations in your Punnett Square page.Phenotype you’ve found in offspringNumber of offspring with this phenotype Questions:1. Are gametes haploid or diploid? What about the offspring, are they haploid or diploid? (1pt)Gametes are haploid and the offspring are diploid2. a) Can two white flowered wrinkled seeded parents produce offspring that have purple flowersand smooth seeds?Explain using a Punnett square why you think this outcome is possible or not. (1 pt)b) Can two purple flowered and yellow seeded parents produce offspring that have whiteflowers and green seeds?Explain using a Punnett square why you think this outcome is possible or not. (1 pt)It is possible if the parent has heterozygote for purple flowers and yellow seededMale gametes placed acrossADAaaDadFemale Gametes placed below:ADAADDAADaAaDDAaDdAdAADdAAddAaDdAaddaDAaDDAaDdaaDDaaDd adAaDdAaddaaDdaadd
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