Assume that genes A and B are on the same chromosome and are 50 map units apart. An animal heterozygous at both loci is crossed with one that is homozygous recessive at both loci. What percentage of the offspring will show recombinant phenotypes resulting from crossovers? Without knowing these genes are on the same chromosome, how would you interpret the results of this cross?

Video transcript

Hello everyone here we have a question that says genes for eye color and wing size of joseph ella are located on the same chromosome. A wild type Drosophila. Hetero zegas for both eye color and wing size is made with the joseph L. A. Which is homo ziggy's recessive at both the lok I. Which of the following accurately depicts the percentage of offsprings with recombinant phenotype. So a wild type Drosophila. Hetero zegas for both eye color and wing size. So that would be capital R lower case R. Capital W. Lower case W. And a Drosophila. Which is homos I guess recesses um at both locations. So that would be lower case R. Lowercase R. Lower case W. Lower case W. So now we're gonna do a punnett square. So we have our W. R. W. R. W. R. W. And we have capital R. Capital W. Capital R. Lowercase W. Lower case R capital W. Lower case R. Lowercase W. So we'll have capital R. Lowercase R. Capital W. Lower case W. Capital R. Lowercase R. Capital W. Lower case W. Capital R. Lowercase R. Capital W. Lower case W. Capital R. Lowercase R. Capital W. Lower case. W. Capital R. Lowercase. R. Lower case W. Lower case W. Capital R. Lowercase R. Lower case W. Lower case W. Capital R. Lowercase are lower case W. Lower case W. Capital R. Lowercase are lower case W. Lower case W. Lower case. R. Lowercase R. Capital W. Lower case W. Lower case are lower case. R. Capital W. Lower case W. Lower case. R. Lowercase R. Capital W. Lower case W. Lower case R. Lower case R. Capital W. Lower case W. Lower case R. Lowercase are lower case W. Lower case W. Lower case R. Lowercase R. Lower case W. Lower case W. Lower case R. Lowercase are lower case W. Lower case W. Lower case R. Lowercase are lower case W. Lower case W. And the question is asking the percentage of offspring with recombinant phenotype. So our recombinant phenotype sar phenotype that are not the same as our parents. So that's going to be These two right here. So that makes up 50% of our Punnett Square. So our answer here is be 50%. Thank you for watching bye.