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b b What is the probability of a homozygous recessive offspring for these two parents? A. 25% B. 50% C. 75% D. 0% B

b b What is the probability of a homozygous recessive offspring for these two parents? A. 25% B. 50% C. 75% D. 0% B

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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**Transcription and Explanation for Educational Website** **Question:** What is the probability of a homozygous recessive offspring for these two parents? **Punnett Square Diagram:** The diagram is a Punnett square used to predict the genetic outcome of a cross between two organisms. It consists of four squares that show the possible genotypes of the offspring. - The alleles from one parent are labeled across the top: `b`, `b`. - The alleles from the other parent are labeled along the side: `B`, `b`. The squares inside the Punnett square are empty, indicating where the combinations of these alleles will be placed to determine the possible genotypes of the offspring. The Punnett Square is designed to account for all combinations of parental alleles. **Answer Choices:** A. 25% B. 50% C. 75% D. 0% **Educational Explanation:** In this genetic cross, the parent genotypes are heterozygous `Bb` and homozygous recessive `bb`. Completing the Punnett square: - Top left: `Bb` - Top right: `Bb` - Bottom left: `bb` - Bottom right: `bb` Therefore, there are two `bb` combinations out of four possible combinations, resulting in a 50% probability of homozygous recessive offspring. The correct answer is B. 50%.
Transcribed Image Text:**Transcription and Explanation for Educational Website** **Question:** What is the probability of a homozygous recessive offspring for these two parents? **Punnett Square Diagram:** The diagram is a Punnett square used to predict the genetic outcome of a cross between two organisms. It consists of four squares that show the possible genotypes of the offspring. - The alleles from one parent are labeled across the top: `b`, `b`. - The alleles from the other parent are labeled along the side: `B`, `b`. The squares inside the Punnett square are empty, indicating where the combinations of these alleles will be placed to determine the possible genotypes of the offspring. The Punnett Square is designed to account for all combinations of parental alleles. **Answer Choices:** A. 25% B. 50% C. 75% D. 0% **Educational Explanation:** In this genetic cross, the parent genotypes are heterozygous `Bb` and homozygous recessive `bb`. Completing the Punnett square: - Top left: `Bb` - Top right: `Bb` - Bottom left: `bb` - Bottom right: `bb` Therefore, there are two `bb` combinations out of four possible combinations, resulting in a 50% probability of homozygous recessive offspring. The correct answer is B. 50%.
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