The result of the first filial generation, in which all the offspring are black when the white guinea pig having ovary of black guinea pig is mated with white guinea pig. Introduction: The black color coat is dominant over the white color coat in guinea pigs. The presence of two copies of recessive alleles leads to the expression of white coat, while the presence of one or two dominant alleles leads to the expression of black coat.

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Answer 1

Question

Chapter 3.2, Problem 17AQP

a.

Summary Introduction

To determine:

The result of the first filial generation, in which all the offspring are black when the white guinea pig having ovary of black guinea pig is mated with white guinea pig.

Introduction:

The black color coat is dominant over the white color coat in guinea pigs. The presence of two copies of recessive alleles leads to the expression of white coat, while the presence of one or two dominant alleles leads to the expression of black coat.

b.

Summary Introduction

To determine:

The genotypes of all the offspring in this cross.

Introduction:

The black color coat is dominant over the white color coat in guinea pigs. The presence of two copies of recessive alleles leads to the expression of white coat, while the presence of one or two dominant alleles leads to the expression of black coat.

c.

Summary Introduction

To indicate:

The validity of pangenesis and the germ-plasm theories.

Introduction:

The black color coat is dominant over the white color coat in guinea pigs. The presence of two copies of recessive alleles leads to the expression of white coat, while the presence of one or two dominant alleles leads to the expression of black coat.

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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 3.2, Problem 17AQP

a.

Summary Introduction

To determine:

The result of the first filial generation, in which all the offspring are black when the white guinea pig having ovary of black guinea pig is mated with white guinea pig.

Introduction:

The black color coat is dominant over the white color coat in guinea pigs. The presence of two copies of recessive alleles leads to the expression of white coat, while the presence of one or two dominant alleles leads to the expression of black coat.

b.

Summary Introduction

To determine:

The genotypes of all the offspring in this cross.

Introduction:

The black color coat is dominant over the white color coat in guinea pigs. The presence of two copies of recessive alleles leads to the expression of white coat, while the presence of one or two dominant alleles leads to the expression of black coat.

c.

Summary Introduction

To indicate:

The validity of pangenesis and the germ-plasm theories.

Introduction:

The black color coat is dominant over the white color coat in guinea pigs. The presence of two copies of recessive alleles leads to the expression of white coat, while the presence of one or two dominant alleles leads to the expression of black coat.

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Answer 3

Question

Chapter 3.2, Problem 17AQP

a.

Summary Introduction

To determine:

The result of the first filial generation, in which all the offspring are black when the white guinea pig having ovary of black guinea pig is mated with white guinea pig.

Introduction:

The black color coat is dominant over the white color coat in guinea pigs. The presence of two copies of recessive alleles leads to the expression of white coat, while the presence of one or two dominant alleles leads to the expression of black coat.

b.

Summary Introduction

To determine:

The genotypes of all the offspring in this cross.

Introduction:

The black color coat is dominant over the white color coat in guinea pigs. The presence of two copies of recessive alleles leads to the expression of white coat, while the presence of one or two dominant alleles leads to the expression of black coat.

c.

Summary Introduction

To indicate:

The validity of pangenesis and the germ-plasm theories.

Introduction:

The black color coat is dominant over the white color coat in guinea pigs. The presence of two copies of recessive alleles leads to the expression of white coat, while the presence of one or two dominant alleles leads to the expression of black coat.

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Answer 4

Question

Chapter 3.2, Problem 17AQP

a.

Summary Introduction

To determine:

The result of the first filial generation, in which all the offspring are black when the white guinea pig having ovary of black guinea pig is mated with white guinea pig.

Introduction:

The black color coat is dominant over the white color coat in guinea pigs. The presence of two copies of recessive alleles leads to the expression of white coat, while the presence of one or two dominant alleles leads to the expression of black coat.

b.

Summary Introduction

To determine:

The genotypes of all the offspring in this cross.

Introduction:

The black color coat is dominant over the white color coat in guinea pigs. The presence of two copies of recessive alleles leads to the expression of white coat, while the presence of one or two dominant alleles leads to the expression of black coat.

c.

Summary Introduction

To indicate:

The validity of pangenesis and the germ-plasm theories.

Introduction:

The black color coat is dominant over the white color coat in guinea pigs. The presence of two copies of recessive alleles leads to the expression of white coat, while the presence of one or two dominant alleles leads to the expression of black coat.

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Answer 5

Chapter 3.2, Problem 17AQP

a.

Summary Introduction

To determine:

The result of the first filial generation, in which all the offspring are black when the white guinea pig having ovary of black guinea pig is mated with white guinea pig.

Introduction:

The black color coat is dominant over the white color coat in guinea pigs. The presence of two copies of recessive alleles leads to the expression of white coat, while the presence of one or two dominant alleles leads to the expression of black coat.

b.

Summary Introduction

To determine:

The genotypes of all the offspring in this cross.

Introduction:

The black color coat is dominant over the white color coat in guinea pigs. The presence of two copies of recessive alleles leads to the expression of white coat, while the presence of one or two dominant alleles leads to the expression of black coat.

c.

Summary Introduction

To indicate:

The validity of pangenesis and the germ-plasm theories.

Introduction:

The black color coat is dominant over the white color coat in guinea pigs. The presence of two copies of recessive alleles leads to the expression of white coat, while the presence of one or two dominant alleles leads to the expression of black coat.

Answer 6

Chapter 3.2, Problem 17AQP

a.

Summary Introduction

To determine:

The result of the first filial generation, in which all the offspring are black when the white guinea pig having ovary of black guinea pig is mated with white guinea pig.

Introduction:

The black color coat is dominant over the white color coat in guinea pigs. The presence of two copies of recessive alleles leads to the expression of white coat, while the presence of one or two dominant alleles leads to the expression of black coat.

Answer 7

Chapter 3.2, Problem 17AQP

a.

Summary Introduction

To determine:

The result of the first filial generation, in which all the offspring are black when the white guinea pig having ovary of black guinea pig is mated with white guinea pig.

Introduction:

The black color coat is dominant over the white color coat in guinea pigs. The presence of two copies of recessive alleles leads to the expression of white coat, while the presence of one or two dominant alleles leads to the expression of black coat.

Answer 8

b.

Summary Introduction

To determine:

The genotypes of all the offspring in this cross.

Introduction:

The black color coat is dominant over the white color coat in guinea pigs. The presence of two copies of recessive alleles leads to the expression of white coat, while the presence of one or two dominant alleles leads to the expression of black coat.

Answer 9

b.

Summary Introduction

To determine:

The genotypes of all the offspring in this cross.

Introduction:

The black color coat is dominant over the white color coat in guinea pigs. The presence of two copies of recessive alleles leads to the expression of white coat, while the presence of one or two dominant alleles leads to the expression of black coat.

Answer 10

c.

Summary Introduction

To indicate:

The validity of pangenesis and the germ-plasm theories.

Introduction:

The black color coat is dominant over the white color coat in guinea pigs. The presence of two copies of recessive alleles leads to the expression of white coat, while the presence of one or two dominant alleles leads to the expression of black coat.

Answer 11

c.

Summary Introduction

To indicate:

The validity of pangenesis and the germ-plasm theories.

Introduction:

The black color coat is dominant over the white color coat in guinea pigs. The presence of two copies of recessive alleles leads to the expression of white coat, while the presence of one or two dominant alleles leads to the expression of black coat.

Answer 12

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Answer 13

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Answer 14

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Answer 15

Ch. 3.1 - Prob. 13AQP Ch. 3.1 - Prob. 1CC Ch. 3.1 - Prob. 1COQ Ch. 3.1 - Prob. 2CC Ch. 3.1 - Prob. 2COQ Ch. 3.2 - Prob. 14AQP Ch. 3.2 - Prob. 15AQP Ch. 3.2 - Prob. 16AQP Ch. 3.2 - Prob. 17AQP Ch. 3.2 - Prob. 18AQP

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