00:01
So here in this question, we have been given that cystic fibrosis is an autosomal recessive disorder, which means that for a person to be affected with this disorder, for a person to be affected, he or she must be carrying both the affected alleles.
00:54
Must be carrying both affected recessive alleles.
01:12
Here we are using capital a as dominant allele and small a as recessive allele for cystic fibrosis.
01:31
Recessively for cystic fibrosis.
01:38
Now a male who is heterozygous for cystic fibrosis allele and carrying 1x7 -1 by chromosome is crossed with a female who is also hetrozygous for cystic fibrosis allele and carrying two x chromosomes.
02:06
Now here we have to make two punnid squares, one for cystic fibrosis and another to determine the sex of progeny.
02:31
Now in the first punnid square we'll be using gametes for cystic fibrosis that is capital and small a for male and female both.
02:46
Now here the genotype will be getting a capital a capital a, capital a that is hetrozygous, capital a, that is also hetrozygous and small a small a...