Question

Using a Punnett square if you have parent 1 with genotype R1R and parent 2 with genotype R1r1, which of the following statements best describes the most probable Rh genotype of the 4 children: a) 2 with Rh positive (R1R) and 2 with Rh negative (R1r1). b) 4 with Rh positive (R1R). c) 4 with Rh negative (R1r1). d) 2 with Rh positive (R1R) and 2 with Rh heterozygous (R1Rr1).

Answer 1

By using a Punnett square, it's determined that the most probable Rh genotype for children of parents with genotypes R1R and R1r1 would be two children with Rh positive (R1R) and two with Rh negative (R1r1).

Step-by-step explanation:

To solve this problem, we can draw a Punnett square for the parents' genotypes. The Punnett square is a graphical method used in genetics to determine the probabilities of genotypes in the offspring of a cross. For parent 1 with genotype R1R and parent 2 with genotype R1r1, the possible genotypes for their offspring are R1R, and R1r1.

So, let's fill out the Punnett Square with these genotypes:

• Row 1: R1 from parent 1 pairs with R1 and r1 from parent 2, resulting in R1R1 and R1r1.
• Row 2: R from parent 1 pairs with R1 and r1 from parent 2, resulting in R1R and R1r1.

According to these outcomes, the correct answer is: Two children might have the genotype Rh positive (R1R) while the other two children might have the Rh negative (R1r1). Therefore, option A is the accurate representation of the expected genotypic distribution.

Learn more about Punnett Square