Based on our discussion of the potential inaccuracy of mapping (see Figure 5.12), would you revise your answer to Problem 22? If so, how?

Video transcript

Hello everyone. Let's look at our next problem here. It says if genes are located on the same chromosome, they are said to be and the term we're looking here for jeans physically on the same chromosome as choice C linked. And of course if those genes are close enough on that chromosome, they will almost never be separated by a crossover event and therefore will be inherited together. So in that case not following Mendel's law of independent assortment. Let's just look briefly at our other answer choices here to understand why they are not correct. Voice A says homologous. Well homologous genes are genes that are inherited from a common ancestor. So that's not what we're looking for here. Same ancestor but on the same chromosome. And then we also the term homologous chromosomes. But homologous chromosomes are those two chromosomes in a pair, one from the mother and one from the father that are the same chromosomes, chromosome one from both our chromosome four from both. So not again, not what we're talking about. Homologous genes are not genes located on the same chromosome. Homologous genes would be genes inherited in two different species from a common ancestor. So not our answer. Then we have choice be dominant and choice D recessive. Well these don't refer to location on the chromosome dominant. Recessive would be terms for of course those alleles dominant alleles that mask the expression of recessive recessive alleles that can only be expressed when there are two copies of that. So Choice B and choice D. Are not our correct answer. Genes located on the same chromosome are said to be Choice C linked. See you in the next video.