At an autosomal gene locus in humans the allele for brown...

At an autosomal gene locus in humans, the allele for brown eyes is dominant over the allele for blue eyes. At another gene locus, located on the X chromosome, a recessive allele produces colorblindness while the dominant allele produces normal color vision. A heterozygous brown-eyed woman who is a carrier of colorblindness has children with a blue-eyed man who is not colorblind. What is the probability that their first child will be a blue-eyed female who has normal color vision? (Enter the probability as a percent. Enter the number only without the percent sign. For example, enter 100% as 100 and enter 12.5% as 12.5)

Transcript

00:01 Another one answer this question is talk about inheritance.

00:02 It says, an autosomal gene, locust in humans, the allele for brown eyes is dominant over the allele for blue eyes.

00:08 So let's suppose that this is a dominant allele for brown eyes and this is a recessive allele for blue eyes.

00:17 It says, at another locus located on the x chromosome, so this is x -linked, a recessive allele produces color blindness.

00:24 So this is going to be the normal allele, the normal visual allele, and this recessive is going to be the colorblindness allele.

00:36 Let's make it like this.

00:41 Color blindness allele.

00:43 Okay.

00:43 So it says a heterocygous brown -eyed woman.

00:47 So a heterocygous brown -eyed woman is going to be like this, hetero -sigold brown -eyed woman, who is a cower for color blindness.

00:54 It means she's going to be heterocycle for color blindness.

00:59 Has children with a blue -eyed man.

01:01 A blue -eyed man is going to be, homoseal excessive, who is not colorblind.

01:06 It means that his genotype for colorblind isn't going to be like this.

01:11 You remember that males for x -link traits, they are not going to be a obvious because they have only one x chromosome.

01:18 So this is your cross.

01:20 And it says, what is the probability that their first child will be a blue -eyed female who has normal color vision? so instead of making a hybrid panel square here, you can make two mono -hybridic matrix squares, crossing these heterosegos b with this homocyteocytes b, and then this heterocygousous for a.

01:37 With this normal mail.

01:39 So you're going to have the following cross.

01:41 Hitrocygos for b.

01:43 With homocygousous for b, you're going to get hetrocygote, hetrocygose, homocygose progressive, and homocygous and recesses.

01:54 And now here you're going to have the heterosibos and the normal vision main here.

02:02 They want to get homozygoyose dominant.

02:06 You're going to get here, heterositegos, here you're going to have a normal vision song and a colorblind song.

02:14 So they are asking you for the chances to get a blue -eyed female...