Question 1:Which of these statements is incorrect?Syntenic genes are located on the same
Question 1:Which of these statements is incorrect?Syntenic genes are located on the same
chromosome.
Independent assortment results in recombinant chromosomes.
You can reliably predict the relative genetic distance from genes’ physical distance on a chromosome.
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Linked genes are always syntenic.
Question 2:
What is the relative genetic distance between two linked genes if the recombination frequency is 0.49?
Question 3:
What statement best explains the distortion in Mendelian ratios observed by Bateson & Punnett in 1905? (Reminder: they found an overrepresentation of F2 offspring showing both dominant or recessive phenotypes, and an underrepresentation of offspring displaying one dominant and one recessive phenotype)
-Human error: they should have been more careful about their experimental setup.
-Gene linkage: Genes for flower color and pollen shape are physically close on the same chromosome, leading to a breakdown in the independent assortment of the alleles for these traits.
-Chromosome crossover: Homologous recombination of two chromatids during meiosis caused the alleles to shuffle, resulting in a breakdown of the independent assortment of the alleles for those genes.
-Random variation: No two situations are alike. In finite populations, you are going to get some variation across a mean.