**Determination of Horns in Goats**In some goats, the presence of horns is determined by an autosomal gene that is dominant in males and recessive in females. This means that the expression of this gene differs depending on the sex of the goat. Consider a genetic cross between a horned female goat with genotype H+H+ and a horned male goat with genotype H+H-. Here, H+ represents the allele for the presence of horns, while H- represents the allele for hornlessness.**Question:**In the cross described above, what percentage of the male offspring would be predicted to have horns?**Options:**- 100 percent- 25 percent- 50 percent- zeroIn solving this genetic problem, it is essential to understand the dominance and recessiveness pattern of the gene. A Punnett square can be utilized to predict the genotypes of the offspring and their corresponding phenotypes (presence or absence of horns).**Explanation of Terms:**- **Autosomal Gene**: A gene located on a non-sex chromosome.- **Dominant in Males**: A single copy of the allele (H+) is enough for males to express the phenotype (presence of horns).- **Recessive in Females**: Females need two copies of the allele (H+H+) to express the phenotype (presence of horns).Understanding this, the prediction can be made:1. Represent the parental genotypes: - Female: H+H+ - Male: H+H-2. Perform a genetic cross: - Female gametes: H+ - Male gametes: H+ and H-3. Offspring genotypes and phenotypes: - Possible offspring genotypes: H+H+, H+H- - Interpretation for males: - H+H+: Horned - H+H-: HornedSince both genotypes for male offspring (H+H+ and H+H-) result in the presence of horns, 100 percent of the male offspring will have horns. Thus, the correct answer is:- **100 percent**This demonstrates the inheritance pattern and phenotypic outcome based on autosomal genes with sex-dependent expression.

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In some goats, the presence of horns is determined by an autosomal gene that is dominant in males and recessive in females. A horned female H+H+ is crossed with a horned male H+H-. H+ represents the allele for presence of horns and H- represents the allele for hornlessness. In the cross described above, what percentage of the male offspring would be predicted to have horns? 100 percent 25 percent 50 percent zero

In some goats, the presence of horns is determined by an autosomal gene that is dominant in males and recessive in females. A horned female H+H+ is crossed with a horned male H+H-. H+ represents the allele for presence of horns and H- represents the allele for hornlessness. In the cross described above, what percentage of the male offspring would be predicted to have horns? 100 percent 25 percent 50 percent zero

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter11: Genome Alterations: Mutation And Epigenetics

Section: Chapter Questions

Problem 16QP: Familial retinoblastoma, a rare autosomal dominant defect, arose in a large family that had no prior...

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Concept explainers

Inheritance and Mendelian Genetics

Inheritance means the passing of traits to offspring from parents. These traits could be passed either through asexual reproduction or sexual reproduction. The offspring receives the genetic material from the parents. Mendelian inheritance is a certain biological inheritance that follows the rules and principles laid down by Gregor Mendel in 1865. The initial hypothesis was considered wrong, but other inheritance theories modified the concept of inheritance and thus genetics.

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Question

**Determination of Horns in Goats**

In some goats, the presence of horns is determined by an autosomal gene that is dominant in males and recessive in females. This means that the expression of this gene differs depending on the sex of the goat.

Consider a genetic cross between a horned female goat with genotype H+H+ and a horned male goat with genotype H+H-. Here, H+ represents the allele for the presence of horns, while H- represents the allele for hornlessness.

**Question:**
In the cross described above, what percentage of the male offspring would be predicted to have horns?

**Options:**
- 100 percent
- 25 percent
- 50 percent
- zero

In solving this genetic problem, it is essential to understand the dominance and recessiveness pattern of the gene. A Punnett square can be utilized to predict the genotypes of the offspring and their corresponding phenotypes (presence or absence of horns).

**Explanation of Terms:**
- **Autosomal Gene**: A gene located on a non-sex chromosome.
- **Dominant in Males**: A single copy of the allele (H+) is enough for males to express the phenotype (presence of horns).
- **Recessive in Females**: Females need two copies of the allele (H+H+) to express the phenotype (presence of horns).

Understanding this, the prediction can be made:

1. Represent the parental genotypes:
- Female: H+H+
- Male: H+H-

2. Perform a genetic cross:
- Female gametes: H+
- Male gametes: H+ and H-

3. Offspring genotypes and phenotypes:
- Possible offspring genotypes: H+H+, H+H-
- Interpretation for males:
- H+H+: Horned
- H+H-: Horned

Since both genotypes for male offspring (H+H+ and H+H-) result in the presence of horns, 100 percent of the male offspring will have horns.

Thus, the correct answer is:
- **100 percent**

This demonstrates the inheritance pattern and phenotypic outcome based on autosomal genes with sex-dependent expression.

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