You are interested in studying plant height and seed shape...

Name: you are interested in studying plant height and seed shape in the same cross remember that tall plants are dominant and short plants are recessive also smooth seeds are dominant and wrinkled 08688
Uploaded: 2023-05-12T21:02:02-08:00
Duration: 5 min 15 s
Channel: Bryan Valdivia
Description: you are interested in studying plant height and seed shape in the same cross remember that tall plants are dominant and short plants are recessive also smooth seeds are dominant and wrinkled 08688

You are interested in studying plant height and seed shape in the same cross. Remember that tall plants are dominant and short plants are recessive. Also, smooth seeds are dominant and wrinkled seeds are recessive. You cross 2 plants: Plant 1: Short plants and wrinkled seeds. Plant 2: Tall plants (heterozygote) and smooth seeds (heterozygote) We will use A/a for plant height and T/t for seed shape.

Transcript

00:01 Okay this question says, you set up a dihybrid cross between two plants that are tall and have yellow seeds.

00:08 Both plants are heterozygous for both trees.

00:10 The gene controlling plant height is the t gene and it shows simple dominance with the dominant allele, it means the homozygous dominant and the heterozygous are gonna call for tall, and the homozygous is gonna be for short.

00:26 Then it says the gene controlling seed color is the y gene where the homozygous dominant and the heterozygous are gonna call for yellow and the homozygous is gonna call for green.

00:41 And it says you classify the progeny for the crossing to the following categories and you have the following okay, you have 121 tall plants with yellow seeds, 32 tall plants with green seeds and so on.

00:53 And it says grounded to the ones placed, how many plants are expected that are tall with green seeds? so when you get a dihybrid cross well this is gonna be your cross in this case right, like this and like this okay.

01:15 And from this dihybrid cross you usually get a 9, 3, 3, 1 phenotypic ratio where 9 are gonna be tall and yellow, 3 are gonna be tall and green, 3 are gonna be short and yellow and 1 is gonna be tall or i'm sorry short and green okay.

01:40 This is 9 16s, 3 16s, 3 16s and 1 16.

01:45 In this case you have a total of, in this case you have a total of let me add these numbers here 121 plus 32 plus 28 plus 19 this is equal to 200.

01:59 So 200 you have in total here.

02:01 So if you want, let's find the radius for each of these phenotypes.

02:05 This is the observed okay and this is the expected.

02:07 Let's see the radius are similar to this one here...

Question

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