An autosomal recessive form of deafness is caused by a mutation in the ESPN gene (E = dominant allele and e = recessive allele). An autosomal recessive disease called Usher syndrome is caused by a mutation in the USH2A gene (H = dominant allele and h = recessive allele). The ESPN and USH2A genes are far apart on chromosome 1. Iris's genotype= eeHH Zacharias' genotype= EEhh Zacharias and Iris have a daughter named Gianna (EeHh) who produces an eh gamete. Here are some pictures of metaphase I cells before recombination has been resolved. Which one of the pictures correctly depicts Gianna's metaphase I cell that could divide to produce her eh gamete? (Hint: it is useful to consider the gametes that Iris and Zacharias each contributed to Gianna)
An autosomal recessive form of deafness is caused by a mutation in the ESPN gene (E = dominant allele and e = recessive allele). An autosomal recessive disease called Usher syndrome is caused by a mutation in the USH2A gene (H = dominant allele and h = recessive allele). The ESPN and USH2A genes are far apart on chromosome 1.
Iris's genotype= eeHH
Zacharias' genotype= EEhh
Zacharias and Iris have a daughter named Gianna (EeHh) who produces an eh gamete.
Here are some pictures of metaphase I cells before recombination has been resolved. Which one of the pictures correctly depicts Gianna's metaphase I cell that could divide to produce her eh gamete? (Hint: it is useful to consider the gametes that Iris and Zacharias each contributed to Gianna)
Prior to ascertaining the accurate depiction of Gianna's metaphase I cell, it is essential to revisit the parental genotypes.
The genotype of Iris is eeHH.
The genotype of Zacharias. The user's text lacks clarity and coherence.
Based on the above genotypes, it is possible to infer the specific alleles that were contributed by each parent to Gianna.
Iris made a contribution of "e" and "H" alleles.
Zacharias made a contribution of "E" and "h" alleles.
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