Hey I have a worksheet due on virtual lab 6 punnett squares. I want to post all my questions. Do I do it in this box? Thanks everyone, newbe here! sorry Chris.
Hey I have a worksheet due on virtual lab 6 punnett squares. I want to post all my questions. Do I do it in this box? Thanks everyone, newbe here! sorry Chris.
BIO 101 Punnett Squares
http://www.mhhe.com/biosci/genbio/virtual_labs_2K8/labs/BL_05/index.htmlRead through the instructions on the right. Watch the video on the “TV” to learn about how to set up a Punnett square. Then, when ready, click the lab notebook to begin working the problems.
A scenario will be shown in the upper left-hand corner. To set up the parents, click and hold the “down triangle” below each parent. Then choose the parent fly that you want. After you have set up both parents click “Check Parents”. Once the parents are correct, click and drag the genotypes and phenotypes of the offspring into the boxes in the Punnett square. Click “Check Offspring” when you have the Punnett square completed. Once you have completed it successfully, click “Reset” to get another scenario.
The scenarios are given at random. Please make sure to look at the number so that you are filling out the correct part on this worksheet! If you get a scenario you have already done, click “Reset” to get another scenario. (Scenario #1 has been done for you to show you how to answer the others.)
Scenario #1
Parent 1 Parent 2
Genotype (alleles) Gg Genotype (alleles) gg
Genotype (term) Heterozygous Genotype (term) Homozyous recessive
Phenotype Grey body Phenotype Black body
Expected genotype ratio of the offspring:
1 Gg: 1 gg (or 2 Gg: 2 gg)
Expected phenotype ratio of the offspring:
1 black: 1 grey (or 2 black: 2 grey)
Scenario #2
Parent 1 Parent 2
Genotype (alleles) Genotype (alleles)
Genotype (term) Genotype (term)
Phenotype Phenotype
Expected genotype ratio of the offspring:
Expected phenotype ratio of the offspring:
Scenario #3
Parent 1 Parent 2
Genotype (alleles) Genotype (alleles)
Genotype (term) Genotype (term)
Phenotype Phenotype
Expected genotype ratio of the offspring:
Expected phenotype ratio of the offspring:
Scenario #4
Parent 1 Parent 2
Genotype (alleles) Genotype (alleles)
Genotype (term) Genotype (term)
Phenotype Phenotype
Expected genotype ratio of the offspring:
Expected phenotype ratio of the offspring:
Scenario #5
Parent 1 Parent 2
Genotype (alleles) Genotype (alleles)
Genotype (term) Genotype (term)
Phenotype Phenotype
Expected genotype ratio of the offspring:
Expected phenotype ratio of the offspring:
Scenario #6
Parent 1 Parent 2
Genotype (alleles) Genotype (alleles)
Genotype (term) Genotype (term)
Phenotype Phenotype
Expected genotype ratio of the offspring:
Expected phenotype ratio of the offspring:
Scenario #7
Parent 1 Parent 2
Genotype (alleles) Genotype (alleles)
Genotype (term) Genotype (term)
Phenotype Phenotype
Expected genotype ratio of the offspring:
Expected phenotype ratio of the offspring:
Scenario #8
Parent 1 Parent 2
Genotype (alleles) Genotype (alleles)
Genotype (term) Genotype (term)
Phenotype Phenotype
Expected genotype ratio of the offspring:
Expected phenotype ratio of the offspring:
Scenario #9
Parent 1 Parent 2
Genotype (alleles) Genotype (alleles)
Genotype (term) Genotype (term)
Phenotype Phenotype
Expected genotype ratio of the offspring:
Expected phenotype ratio of the offspring:
Scenario #10
Parent 1 Parent 2
Genotype (alleles) Genotype (alleles)
Genotype (term) Genotype (term)
Phenotype Phenotype
Expected genotype ratio of the offspring:
Expected phenotype ratio of the offspring:
Summary Questions
1) If you are given a grey-bodied fly, do you know the genotype of it? Why or why not?
2) You are given a long-winged fly and told to determine its genotype. What cross would you perform? Explain how the results would tell you the genotype of this long-winged fly.
3) Explain why an organism that is homozygous dominant has the same phenotype as an organism that is heterozygous.
4) What information can you get from a Punnett square? What information can you NOT get from a Punnett square?
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