Answered

Westonci.ca is your trusted source for accurate answers to all your questions. Join our community and start learning today! Get immediate and reliable answers to your questions from a community of experienced experts on our platform. Experience the ease of finding precise answers to your questions from a knowledgeable community of experts.

15. A pedigree chart is a visual representation of the frequency and appearance of phenotypes of a particular gene. The figure below shows a pedigree chart for red-green colorblindness in a human family. The disorder is sex-linked recessive (Xb). Since the genes for the and green color receptors are located on the X chromosome, males are more likely to be affected than females.Typically, each individual in a pedigree chart is assigned a number. The genotype for Individual 1 is XbY, and the genotype for Individual 4 is XBXb, the genotype for Individual 24 is XbXb.Suppose individuals 21 and 22 have only male biological children. Based on the pedigree chart, on average, what percent of children are colorblind?50%25%0%100%

15 A Pedigree Chart Is A Visual Representation Of The Frequency And Appearance Of Phenotypes Of A Particular Gene The Figure Below Shows A Pedigree Chart For Re class=

Sagot :

Explanation:

Remember that colorblindness is an X-linked recessive disorder. Now, let us denote by "a" the recessive (affected) allele and by "A" the dominant (normal) allele.

Now, consider the following pedigree chart:

Suppose individuals 21 and 22 have only male biological children. First, notice that individual 21 is a normal female (no carrier). This means that her genotype:

[tex]X_AX_A[/tex]

On the other side, individual 22 presents the affected allele. Since individual 22 is a man, this means that his genotype for the colorblindness would be:

[tex]X_aY[/tex]

thus, the Punnett square of the crossing of these two individuals would be:

Now, according to the problem, individuals 21 and 22 have only male biological children. Then, according to the above Punnett square, we can infer that the percent of children (male biological children) that are colorblind is:

0%

we can conclude that the correct answer is:

Answer:

The percent of children (male biological children) that are colorblind is:

0%

View image SakinahW674793
View image SakinahW674793
We appreciate your time on our site. Don't hesitate to return whenever you have more questions or need further clarification. Thank you for your visit. We're dedicated to helping you find the information you need, whenever you need it. Your questions are important to us at Westonci.ca. Visit again for expert answers and reliable information.