The genes for the traits that Mendel worked with are either all located on different chromosomes or behave as if they were. How did this help Mendel recognize the principle of independent assortment?
a. Otherwise, his dihybrid crosses would not have produced a 9 : 3 : 3 : 1 ratio of F2 phenotypes.
b. The occurrence of individuals with unexpected phenotypes led him to the discovery of recombination.
c. It led him to the realization that the behavior of chromosomes during meiosis explained his results.
d. It meant that the alleles involved were either dominant or recessive, which gave 3 : 1 ratios in the F1 generation.

Question

The genes for the traits that Mendel worked with are either all located on different chromosomes or behave as if they were. How did this help Mendel recognize the principle of independent assortment?

a. Otherwise, his dihybrid crosses would not have produced a 9 : 3 : 3 : 1 ratio of F2 phenotypes.

b. The occurrence of individuals with unexpected phenotypes led him to the discovery of recombination.

c. It led him to the realization that the behavior of chromosomes during meiosis explained his results.

d. It meant that the alleles involved were either dominant or recessive, which gave 3 : 1 ratios in the F1 generation.

Accepted Answer

Hi everyone. Let's look at our next question. Which of the following states that allow sales of two or more different genes get sorted into gametes independently of one another. Well, we've kind of got a clue here in the word independent. Um We our answer choices say a lot of dominance. Be law of segregation. See law of independent assortment or D. Both A and B. Well, we've got the word sorting independently. So that kind of good is going to lead us to the law of independent assortment. And that is indeed what describes this. That refers to the fact that if we have a parent With two different genes on two different chromosomes. So let's imagine RPI in Mendel's Pea with say the shape Hetero Sickos for shape. Hetero sickos for color. These letters are going to symbolize a chromosome with this alley on it. So it's got two chromosomes here with the gene for shape two chromosomes with gene for color and they don't have to stay together. So you don't have to have the round and yellow alley together or the wrinkled and green together. Because during mitosis, when these chromosomes line up along the midline to separate, they can line up in any particular order. So perhaps the chromosome with the big are a little lines up on the same side as big Y. So that might happen. But they don't have to line up that way. Big. R could line up on the same side as little. Why? So because these two don't have to um Line themselves up together. They independently assort resulting in daughter gametes that have all these different combinations of the two genes. So you could end up with these guys with homo cigarettes, or you could end up with tickets for these two genes because they don't need to go together if they're on different chromosomes. So this is the law of independent assortment choice. A lot of dominance has to do with dominant versus recessive genes and that a dominant gene will mask the recessive trait in choice. B says law of segregation. Uh that refers to the fact that for a particular trait an individual has two alleles and will pass only one to its offspring. So that's not what we're describing here. So Choice B. Not our answer. And then of course, Choice D. Both A and B. Is obviously not our answer here. So we're looking at choice. See the law of independent assortment. See you in the next video.

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Key Concepts

Independent Assortment

Chromosome Behavior During Meiosis

Dominant and Recessive Alleles