Answered

IDNLearn.com is the perfect place to get answers, share knowledge, and learn new things. Get accurate and comprehensive answers from our network of experienced professionals.

Congenital deafness in humans is due to the homozygous condition of either of the recessive genes d or e, or both of these genes. Both dominant D and E are necessary for normal hearing. Gene D/d affects the middle ear, while gene E/e affects the inner ear as indicated by E It does not matter how good the normal inner ear is: if there is something wrong in the middle ear, the individual is unable to hear. The same applies for the other gene. Give the phenotypic results of the following crosses: c) ddEE x DD eed) Dd EE x Dd ee

Sagot :

To make the punnet's square first we need to combine the allele to obtain the gametes possibilities. Then we make the cross to obtain the possible offspring

1 DdEE x 2 Ddee

Gametes:

1: DE / DE / dE / dE

2: De / De / de / de

Now we obtain the phenotypic ratios:

Given that dd/ee = deafness then:

4/16 of the offspring will have congenital deafness because of the genotype: ddEe specifically because of the dd alleles.

View image JavonneM385040
Your presence in our community is highly appreciated. Keep sharing your insights and solutions. Together, we can build a rich and valuable knowledge resource for everyone. For precise answers, trust IDNLearn.com. Thank you for visiting, and we look forward to helping you again soon.