colorblindness redgreen is a sexlinked trait Draw a punnet s

color-blindness (red-green) is a sex-linked trait. Draw a punnet square showing phenotypes, genotypes and ratios of children from a mother who is AB and a carrier for colorblindness and a type O father who has normal vision.

Solution

color-blindness (red-green) is a sex-linked trait. Draw a punnet square showing phenotypes, genotypes and ratios of children from a mother who is AB and a carrier for colorblindness and a type O father who has normal vision.

a mother who is AB and a carrier for colorblindness

-GENOTYPE--- I^A I^B X^CX

===================================

and

a type O father who has normal vision.-----GENOTYPE-----I^O I^O XY

CROSS

I^A I^B X^CX ---------- X------------ I^O I^O XY

I^O X

I^O Y

I^A X^C  

I^A X^C I^O X

carrier

female

I^A X^C   I^O Y

AFFECTED

male

I^A X  

I^A X   I^O X

Normal

female

I^A X   I^O Y

Normal

male

I^B X^C  

I^B X^C   I^O X

carrier

female

I^B X^C   I^O Y

AFFECTED

male

I^B X  

I^B X   I^O X

Normal female

I^B X   I^O Y

Normal male

genotype

Phenotype

Normal female

I^A X   I^O X

Blood group A

I^B X   I^O X

Blood group B

Normal male

I^A X   I^O Y

Blood group A

I^B X   I^O Y

Blood group B

affected male

I^A X^C   I^O Y

Blood group A

I^B X^C   I^O Y

Blood group B

Carrier female

I^B X^C   I^O X

Blood group B

I^A X^C I^O X

Blood group A

	IO X	IO Y
IA XC	IA XC IO X carrier female	IA XC   IO Y AFFECTED male
IA X	IA X   IO X Normal female	IA X   IO Y Normal male
IB XC	IB XC   IO X carrier female	IB XC   IO Y AFFECTED male
IB X	IB X   IO X Normal female	IB X   IO Y Normal male