Human Heredity: Principles and Issues (MindTap Course List)
Human Heredity: Principles and Issues (MindTap Course List)
11th Edition
ISBN: 9781305251052
Author: Michael Cummings
Publisher: Cengage Learning
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Chapter 3, Problem 35QP

a.

Summary Introduction

To determine: The possible phenotypes for the co-dominant alleles a, b, c, and recessive allele d.

Introduction: The genotype is the genetic constitution of the organism whereas the phenotype refers to external characters visible in an organism. The alleles are the contrasting forms of a gene, and one of them is dominant, and the other is recessive.

b.

Summary Introduction

To determine: The possible genotypes for the co-dominant alleles a, b, c, and recessive allele d.

Introduction: The dominant allele masks the expression of the recessive allele. Therefore, the dominant allele is expressed in homozygous and heterozygous genotypes whereas the recessive phenotype is only expressed under homozygous condition.

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Name ENRICHMENT ACTIVITY (continued) Genetics Problem Solving Crosses Involving Multiple Alleles 25 Step 4 Combine the gamete genotypes of one parent with those of the other parent to show all possible offspring genotypes. 14 JAJA I^i |8 [+18 1Bi Step 5 State the genotype and phenotype ratios of the offspring. 1 : 1 Pi: 1118: 118 = 141, 141, 148, 1418 2 type A: 1 type AB: 1 type B = 1/2 type A, 14 type AB, 4 type B CHAPTER EXERCISES For each exercise draw the Punnett square when appropriate and answer the questions in the spaces provided. 1. A woman homozygous for type B blood marries a man who is heterozygous type A. What will be the possible genotypes and phenotypes of their children? 2. A man with type O blood marries a woman with type AB blood. What will be the possible genotypes and phenotypes of their children? 3. A type B woman whose mother was type O marries a type O man. What will be the possible genotypes and phenotypes of their children? 4. A type A woman whose father was…
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Part 1 With use of Punnett diagrams discuss how the results of experiments carried out by Austrian monk Gregor Mendel on pea plants brought about the Law of Dominance, the Law of Segregation, and the Law of Independent assortment. Part 2 In humans, the gene that produces the disease Sickle Cell Anaemia is recessive to the gene for healthy haemoglobin production. a) How can two phenotypically healthy parents have a child who suffers from Sickle cell Anaemia? In your answer use suitable letters to show the genotypes of the parents and construct a Punnett diagram to show all the possibilities of the children's genotypes. b) Based on the outcome of your Punnett diagram, state and explain the probability of a child being a sufferer of Sickle Cell Anaemia and the probability of a child not suffering from the disease. c) If an individual who suffers from Sickle cell disease has a child with someone who is healthy (and not carrying the sickle cell gene), what is the probability that the child…

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Human Heredity: Principles and Issues (MindTap Course List)

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