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We appreciate your visit to Based on the pedigree below wooly hair is a recessive hair disorder characterized by sparse tightly curled hair texture This recessive gene also causes freckles. This page offers clear insights and highlights the essential aspects of the topic. Our goal is to provide a helpful and engaging learning experience. Explore the content and find the answers you need!

Based on the pedigree below, wooly hair is a recessive hair disorder characterized by sparse, tightly curled hair texture. This recessive gene also causes freckles.

Using the pedigree, determine the genotype of the individual at B5 (open circle).

Options:
A. WW
B. XWY
C. Ww
D. ww

Answer :

Using the below pedigree, the affected individual at B5 is homozygous recessive for wooly hair disorder, represented by the genotype "ww." The unaffected individuals are either homozygous dominant "WW" or heterozygous "Ww".

In a recessive disorder like wooly hair, individuals must inherit two copies of the recessive allele (one from each parent) to exhibit the phenotype. The presence of unaffected parents with affected offspring suggests that they are carriers of the recessive allele, meaning they have one copy of the allele but do not exhibit the phenotype.

The unaffected individual at B3 must be heterozygous "Ww" because they have at least one copy of the recessive allele to pass it on to their affected child at B5. The unaffected individual at B4 must also be a carrier because they have an affected parent (B5), but do not exhibit the phenotype themselves. The unaffected individual at B2 must be homozygous dominant "WW" because they do not have any copies of the recessive allele to pass on to their children.

To learn more about inheritance, here

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Thanks for taking the time to read Based on the pedigree below wooly hair is a recessive hair disorder characterized by sparse tightly curled hair texture This recessive gene also causes freckles. We hope the insights shared have been valuable and enhanced your understanding of the topic. Don�t hesitate to browse our website for more informative and engaging content!

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