Sweet yellow tomatoes with a pear shape bring a high pri...

Question

Sweet yellow tomatoes with a pear shape bring a high price per basket to growers. Pear shape, yellow color, and terminal flower position are recessive traits produced by alleles f, r, and t, respectively. The dominant phenotypes for each trait—full shape, red color, and axial flower position—are the product of dominant alleles F, R, and T. A farmer has two pure-breeding tomato lines. One is full, yellow, terminal and the other is pear, red, axial. Design a breeding experiment that will produce a line of tomato that is pure-breeding for pear shape, yellow color, and axial flower position.

Accepted Answer

Hello, everyone and welcome to today's video. So the following offspring are observed in a cross between two guinea pigs and they were giving the number of offspring that have either black coat or a white coat, black coat being 1 20 white coat being 97. So based on the above data, What is true about the genotype of the parents of the above progeny? Well, in order to solve this problem, before we jump into the answer choices, I really want you to realize something. If we take the 97 of the White Coat and we divided by the 120 of the black codes, we're going to obtain affirmative ratio of about 0. or four white codes per every five black codes. What this means is that the number is very close to being to 5 or just 1 to 1. So keep that in mind as we solve the problem. First of all, we're going to take a look at answer. Choice is A and B. So both parents are home musicals for Black code or both parents are homosexuals for white coat. So remember if both parents are homosexuals for black code, we can only have black codes in the offspring, which is not the case. As we can see, we have a lot of white coats because of this. We're going to be canceling this out. And then both parents are homosexuals for white coat. This is going to be the same thing. We're only going to have white coats in the offspring. So both answer choices are going to be incorrect and we're going to cancel them out. Then we have the parents are heterosexual. Goes for black code. We'll remember if we cross to hetero zegas organisms, we're going to obtain affirmative ray show of about 3 to 1. This is not the final ratio that we're seeing. So we're going to cancel this out. Finally, we have seen one parent is hetero zegas for black coat and the other is homo say goes for white coat. Well as it turns out when we cross to organisms, one of them is hetero zegas and the other is homosexuals were going to obtain the following ratio. So let's make that cross here. So as we can see, we obtain a final topic ratio of 2 to 2 or just 1 to 1. This final ratio closely resembles what we have for the actual offspring population. Remember that when we're doing these actual experiments, they're never going to be exactly 1 to 1. However, they're going to be very close to it because of that, we're going to select answer choice c as a correct answer to this question. So I really hope this video helped you and I hope to see you on the next one.

My Courses

Chemistry

Biology

Math

Physics

Business

Social Sciences

Programming

Product & Marketing