The genotypes that are probable for the mother of the color-blind man. Introduction: The color blindness is carried on by a faulty color vision gene on the X chromosome as a recessive disorder. Also, this marks about one in ten men and also has two forms.

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Answer 1

Question

Chapter 2, Problem 65P

a.

Summary Introduction

To determine: The genotypes that are probable for the mother of the color-blind man.

Introduction: The color blindness is carried on by a faulty color vision gene on the X chromosome as a recessive disorder. Also, this marks about one in ten men and also has two forms.

Summary Introduction

To determine: The probabilities that the first child will be a color-blind boy.

Introduction: Red or green color blindness is carried from mother to son at the 23rd chromosome, which is identified as the sex chromosome as it further illustrates as sex chromosome.

c.

Summary Introduction

To determine: The proportion that can be estimated to be color-blind of any girl.

Introduction: A color-blind boy cannot inherit a color-blind ‘gene’ from the father, yet his father is color blind as his father can pass an X chromosome to the daughters.

d.

Summary Introduction

To determine: The proportion that can be expected to have a normal color vision of all the children.

Introduction: The color blind 'gene' is conducted on one of the X chromosomes. As men possess only one X chromosome, and if his X chromosome transfers the color blind 'gene' that is 'X,' he will be color blind XY.

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Question #3: In the KeyGene paper, the authors state that it would be useful if pollen from an apomict would transmit apomixis-inducing genes to the female in the cross (assuming the pollen is viable). Assuming there was just one gene conferring gametophytic obligate apomixis, and that the two parents are inbreds, what would be the consequences of such a cross if: a) The apomixis was a dominant trait? Indicate the genotypes and phenotypes (apomict or non- apomict) of the parents, F1 and F2 generations. Remember to include the expected genotypic and phenotypic ratios (or percentages) in the F1 and F2 generations, and to position the female first (left side) in the parental cross. b) The apomixis was a recessive trait? Indicate the genotypes and phenotypes (apomict or non- apomict) of the parents, F1 and F2 generations. Remember to include the expected genotypic and phenotypic ratios (or percentages) in the F1 and F2 generations, and to position the female first (left side) in the…

Question #5: Assume that two genes are identified that confer gametophytic facultative apomixis in soybean. The genes show independent assortment. Recessive alleles at both loci are required for the facultative apomixis. Facultative apomixis is triggered when the temperature at pollination is above 20 degrees C. At temperatures below 20 degrees C, all reproduction is sexual, independent of genotype. A facultative apomict male, capable of producing viable pollen, was crossed with a sexually reproducing female. Assuming the parents are completely inbred, what are the predicted phenotypic ratios (apomict: non-apomict) for the F1, F2, and DH (F1-derived) generations at each of the following temperatures*: a) 15°C? b) 25°C? *for full credit, show crosses and genotypes where appropriate. Remember to position the female first (left side) in the cross. Type your answer here:

Answer 2

Question

Chapter 2, Problem 65P

a.

Summary Introduction

To determine: The genotypes that are probable for the mother of the color-blind man.

Introduction: The color blindness is carried on by a faulty color vision gene on the X chromosome as a recessive disorder. Also, this marks about one in ten men and also has two forms.

Summary Introduction

To determine: The probabilities that the first child will be a color-blind boy.

Introduction: Red or green color blindness is carried from mother to son at the 23rd chromosome, which is identified as the sex chromosome as it further illustrates as sex chromosome.

c.

Summary Introduction

To determine: The proportion that can be estimated to be color-blind of any girl.

Introduction: A color-blind boy cannot inherit a color-blind ‘gene’ from the father, yet his father is color blind as his father can pass an X chromosome to the daughters.

d.

Summary Introduction

To determine: The proportion that can be expected to have a normal color vision of all the children.

Introduction: The color blind 'gene' is conducted on one of the X chromosomes. As men possess only one X chromosome, and if his X chromosome transfers the color blind 'gene' that is 'X,' he will be color blind XY.

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Answer 3

Question

Chapter 2, Problem 65P

a.

Summary Introduction

To determine: The genotypes that are probable for the mother of the color-blind man.

Introduction: The color blindness is carried on by a faulty color vision gene on the X chromosome as a recessive disorder. Also, this marks about one in ten men and also has two forms.

Summary Introduction

To determine: The probabilities that the first child will be a color-blind boy.

Introduction: Red or green color blindness is carried from mother to son at the 23rd chromosome, which is identified as the sex chromosome as it further illustrates as sex chromosome.

c.

Summary Introduction

To determine: The proportion that can be estimated to be color-blind of any girl.

Introduction: A color-blind boy cannot inherit a color-blind ‘gene’ from the father, yet his father is color blind as his father can pass an X chromosome to the daughters.

d.

Summary Introduction

To determine: The proportion that can be expected to have a normal color vision of all the children.

Introduction: The color blind 'gene' is conducted on one of the X chromosomes. As men possess only one X chromosome, and if his X chromosome transfers the color blind 'gene' that is 'X,' he will be color blind XY.

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Answer 4

Question

Chapter 2, Problem 65P

a.

Summary Introduction

To determine: The genotypes that are probable for the mother of the color-blind man.

Introduction: The color blindness is carried on by a faulty color vision gene on the X chromosome as a recessive disorder. Also, this marks about one in ten men and also has two forms.

Summary Introduction

To determine: The probabilities that the first child will be a color-blind boy.

Introduction: Red or green color blindness is carried from mother to son at the 23rd chromosome, which is identified as the sex chromosome as it further illustrates as sex chromosome.

c.

Summary Introduction

To determine: The proportion that can be estimated to be color-blind of any girl.

Introduction: A color-blind boy cannot inherit a color-blind ‘gene’ from the father, yet his father is color blind as his father can pass an X chromosome to the daughters.

d.

Summary Introduction

To determine: The proportion that can be expected to have a normal color vision of all the children.

Introduction: The color blind 'gene' is conducted on one of the X chromosomes. As men possess only one X chromosome, and if his X chromosome transfers the color blind 'gene' that is 'X,' he will be color blind XY.

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Answer 5

Chapter 2, Problem 65P

a.

Summary Introduction

To determine: The genotypes that are probable for the mother of the color-blind man.

Introduction: The color blindness is carried on by a faulty color vision gene on the X chromosome as a recessive disorder. Also, this marks about one in ten men and also has two forms.

Summary Introduction

To determine: The probabilities that the first child will be a color-blind boy.

Introduction: Red or green color blindness is carried from mother to son at the 23rd chromosome, which is identified as the sex chromosome as it further illustrates as sex chromosome.

c.

Summary Introduction

To determine: The proportion that can be estimated to be color-blind of any girl.

Introduction: A color-blind boy cannot inherit a color-blind ‘gene’ from the father, yet his father is color blind as his father can pass an X chromosome to the daughters.

d.

Summary Introduction

To determine: The proportion that can be expected to have a normal color vision of all the children.

Introduction: The color blind 'gene' is conducted on one of the X chromosomes. As men possess only one X chromosome, and if his X chromosome transfers the color blind 'gene' that is 'X,' he will be color blind XY.

Answer 6

Chapter 2, Problem 65P

a.

Summary Introduction

To determine: The genotypes that are probable for the mother of the color-blind man.

Introduction: The color blindness is carried on by a faulty color vision gene on the X chromosome as a recessive disorder. Also, this marks about one in ten men and also has two forms.

Answer 7

Chapter 2, Problem 65P

a.

Summary Introduction

To determine: The genotypes that are probable for the mother of the color-blind man.

Introduction: The color blindness is carried on by a faulty color vision gene on the X chromosome as a recessive disorder. Also, this marks about one in ten men and also has two forms.

Answer 8

Summary Introduction

To determine: The probabilities that the first child will be a color-blind boy.

Introduction: Red or green color blindness is carried from mother to son at the 23rd chromosome, which is identified as the sex chromosome as it further illustrates as sex chromosome.

Answer 9

Summary Introduction

To determine: The probabilities that the first child will be a color-blind boy.

Introduction: Red or green color blindness is carried from mother to son at the 23rd chromosome, which is identified as the sex chromosome as it further illustrates as sex chromosome.

Answer 10

c.

Summary Introduction

To determine: The proportion that can be estimated to be color-blind of any girl.

Introduction: A color-blind boy cannot inherit a color-blind ‘gene’ from the father, yet his father is color blind as his father can pass an X chromosome to the daughters.

Answer 11

c.

Summary Introduction

To determine: The proportion that can be estimated to be color-blind of any girl.

Introduction: A color-blind boy cannot inherit a color-blind ‘gene’ from the father, yet his father is color blind as his father can pass an X chromosome to the daughters.

Answer 12

d.

Summary Introduction

To determine: The proportion that can be expected to have a normal color vision of all the children.

Introduction: The color blind 'gene' is conducted on one of the X chromosomes. As men possess only one X chromosome, and if his X chromosome transfers the color blind 'gene' that is 'X,' he will be color blind XY.

Answer 13

d.

Summary Introduction

To determine: The proportion that can be expected to have a normal color vision of all the children.

Introduction: The color blind 'gene' is conducted on one of the X chromosomes. As men possess only one X chromosome, and if his X chromosome transfers the color blind 'gene' that is 'X,' he will be color blind XY.

Answer 14

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Answer 15

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Answer 16

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Answer 17

Ch. 2 - Prob. 1P Ch. 2 - Prob. 2P Ch. 2 - Prob. 3P Ch. 2 - Prob. 4P Ch. 2 - Prob. 6P Ch. 2 - Prob. 7P Ch. 2 - Prob. 8P Ch. 2 - Prob. 9P Ch. 2 - Prob. 10P Ch. 2 - Prob. 11P

The genotypes that are probable for the mother of the color-blind man. Introduction: The color blindness is carried on by a faulty color vision gene on the X chromosome as a recessive disorder. Also, this marks about one in ten men and also has two forms.

Solution Summary: The author explains that color blindness is carried on by a faulty color vision gene on the X chromosome, which marks about one in ten men.

Concept explainers

Videos

To determine: The genotypes that are probable for the mother of the color-blind man.

Introduction: The color blindness is carried on by a faulty color vision gene on the X chromosome as a recessive disorder. Also, this marks about one in ten men and also has two forms.

To determine: The probabilities that the first child will be a color-blind boy.

Introduction: Red or green color blindness is carried from mother to son at the 23rd chromosome, which is identified as the sex chromosome as it further illustrates as sex chromosome.

To determine: The proportion that can be estimated to be color-blind of any girl.

Introduction: A color-blind boy cannot inherit a color-blind ‘gene’ from the father, yet his father is color blind as his father can pass an X chromosome to the daughters.

Want to see the full answer?

Chapter 2 Solutions

The genotypes that are probable for the mother of the color-blind man. Introduction: The color blindness is carried on by a faulty color vision gene on the X chromosome as a recessive disorder. Also, this marks about one in ten men and also has two forms.

Solution Summary: The author explains that color blindness is carried on by a faulty color vision gene on the X chromosome, which marks about one in ten men.

Concept explainers

Videos

To determine: The genotypes that are probable for the mother of the color-blind man. Introduction: The color blindness is carried on by a faulty color vision gene on the X chromosome as a recessive disorder. Also, this marks about one in ten men and also has two forms.

To determine: The probabilities that the first child will be a color-blind boy. Introduction: Red or green color blindness is carried from mother to son at the 23rd chromosome, which is identified as the sex chromosome as it further illustrates as sex chromosome.

To determine: The proportion that can be estimated to be color-blind of any girl. Introduction: A color-blind boy cannot inherit a color-blind ‘gene’ from the father, yet his father is color blind as his father can pass an X chromosome to the daughters.

Want to see the full answer?

Chapter 2 Solutions

To determine: The genotypes that are probable for the mother of the color-blind man.

Introduction: The color blindness is carried on by a faulty color vision gene on the X chromosome as a recessive disorder. Also, this marks about one in ten men and also has two forms.

To determine: The probabilities that the first child will be a color-blind boy.

Introduction: Red or green color blindness is carried from mother to son at the 23rd chromosome, which is identified as the sex chromosome as it further illustrates as sex chromosome.

To determine: The proportion that can be estimated to be color-blind of any girl.

Introduction: A color-blind boy cannot inherit a color-blind ‘gene’ from the father, yet his father is color blind as his father can pass an X chromosome to the daughters.