11 Drosophila females heterozygous for each of three recess.pdf
1.1. Discuss the product and sum rule used to determine the probabilities that can be obtained given a cross. (4) 1.2. Punnet squares are used to predict the outcome of crosses. Given the dihybrid cross between the following genotypes RRWW (round shaped white apricot seeds) and rrww (flat shaped brown apricot seeds): 1.2.1. Draw a punnet square displaying the dihybrid cross between the two genotypes (2) 1.2.2. Give the genotype ratios (9) 1.2.3. Give the phenotype ratios (4).
11 Drosophila females heterozygous for each of three recess.pdf
1.1. Discuss the product and sum rule used to determine the probabilities that can be obtained given a cross. (4) 1.2. Punnet squares are used to predict the outcome of crosses. Given the dihybrid cross between the following genotypes RRWW (round shaped white apricot seeds) and rrww (flat shaped brown apricot seeds): 1.2.1. Draw a punnet square displaying the dihybrid cross between the two genotypes (2) 1.2.2. Give the genotype ratios (9) 1.2.3. Give the phenotype ratios (4).
![11) Drosophila females heterozygous for each of three recessive autosomal mutations with
independent phenotypic effects [missing bristles (mb), ebony body (e), kidney-shaped eyes (k) ]
were testcrossed to males showing all three mutant phenotypes. The 1000 progeny of this
testcross were a) Draw the best genetic map that explains this data. Discuss briefly how you
determined the order of the genes. ( 4 points) b) Calculate the map distance between these
genes. Show work. (4 points) c) What is a possible explanation for why the frequency of a double
crossover is much lower than expected? ( 2 points)](https://image.slidesharecdn.com/11drosophilafemalesheterozygousforeachofthreerecess-230320160601-4af6ad85/75/11-drosophila-females-heterozygous-for-each-of-three-recesspdf-1-2048.jpg?cb=1679329782)
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11 Drosophila females heterozygous for each of three recess.pdf
- 1. 11) Drosophila females heterozygous for each of three recessive autosomal mutations with independent phenotypic effects [missing bristles (mb), ebony body (e), kidney-shaped eyes (k) ] were testcrossed to males showing all three mutant phenotypes. The 1000 progeny of this testcross were a) Draw the best genetic map that explains this data. Discuss briefly how you determined the order of the genes. ( 4 points) b) Calculate the map distance between these genes. Show work. (4 points) c) What is a possible explanation for why the frequency of a double crossover is much lower than expected? ( 2 points)