2 a heterozygous free earlobed xx individual is a carrier of...

2) A heterozygous free earlobed, XX individual is a carrier of retinitis pigmentosa, a form of blindness (r). They marry an XY individual who has normal vision (R) and has attached earlobes. Retinitis pigmentosa is an X-linked trait. The type of earlobe is an autosomal trait, with free earlobes dominant (F) over attached earlobes (f). What is the probability that any of the offspring produced have the following traits?

Transcript

0:00 Hello students.

00:02 So for the first question that is the child is having autosomal dominant disease or disorder.

00:15 So in this condition let us consider capital a has the affected copy of ali so when crossing the heterocygous small a will be the normal copy.

00:42 Capital a small a into capital a small a so two different type of gametes will be there by each parent crossing together we get three different type of genital types one with capital a capital a capital a small a small a here small a small a small a small a will be normal and as it is autosomal dominant disorder when the dominant allel is present, it will show the condition.

01:18 So it will show the disease.

01:19 Here it will be the deafness.

01:24 So the child will be deaf if he has any two of the genotypes.

01:29 So here we can say that capital a small a and capital a capital a capital a are the genotypes for the affected individual having the autosomal dominant disorder.

01:45 Now for the second question here.

01:48 Here color blindness that is said to be an autosomal recessive disorder so when female carry both affected alleles then the affected phenotype that will be xc xc so when these condition occurs then only the female will be color blind if the genotype is xc and x only then it will be carrier female in the case of male xc and y the male will be affected and x y which is normal so if we are crossing a carrier female with a affected male which means x c x will be the genotype of female and x c y will be the genotype of male so it will be the genotype of male so it will produce the gamutal...

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