Welcome to Westonci.ca, your ultimate destination for finding answers to a wide range of questions from experts. Get quick and reliable answers to your questions from a dedicated community of professionals on our platform. Get precise and detailed answers to your questions from a knowledgeable community of experts on our Q&A platform.
Sagot :
To determine which allele combination represents a female who is heterozygous for a sex-linked trait, let’s first break down the concepts involved.
### Key Concepts
1. Sex Chromosomes and Gender:
- Females have two X chromosomes (XX).
- Males have one X and one Y chromosome (XY).
2. Heterozygosity:
- Heterozygous means having two different alleles for a particular gene.
- In the context of sex-linked traits (those found on the X chromosome), this would mean one allele on each of the two X chromosomes in females.
### Options Analysis
1. Option 1: [tex]\(X^R Y\)[/tex]
- This combination has one X chromosome and one Y chromosome.
- It represents a male genotype, not a female.
2. Option 2: [tex]\(X^{\prime} Y\)[/tex]
- This combination also has one X chromosome and one Y chromosome.
- It represents a male genotype, not a female.
3. Option 3: [tex]\(X^R X^r\)[/tex]
- This combination has two X chromosomes.
- It contains two different alleles ([tex]\(X^R\)[/tex] and [tex]\(X^r\)[/tex]), making it heterozygous.
- This fits the criteria for a female who is heterozygous for a sex-linked trait.
4. Option 4: [tex]\(X^R X^R\)[/tex]
- This combination has two X chromosomes.
- It contains two identical alleles ([tex]\(X^R\)[/tex] and [tex]\(X^R\)[/tex]), making it homozygous.
- This does not fit the criteria for being heterozygous.
### Conclusion
Based on the analysis, the allele combination that represents a female who is heterozygous for a sex-linked trait is [tex]\(X^R X^r\)[/tex].
Thus, the correct answer is:
[tex]\[ X^R X^r \][/tex]
### Key Concepts
1. Sex Chromosomes and Gender:
- Females have two X chromosomes (XX).
- Males have one X and one Y chromosome (XY).
2. Heterozygosity:
- Heterozygous means having two different alleles for a particular gene.
- In the context of sex-linked traits (those found on the X chromosome), this would mean one allele on each of the two X chromosomes in females.
### Options Analysis
1. Option 1: [tex]\(X^R Y\)[/tex]
- This combination has one X chromosome and one Y chromosome.
- It represents a male genotype, not a female.
2. Option 2: [tex]\(X^{\prime} Y\)[/tex]
- This combination also has one X chromosome and one Y chromosome.
- It represents a male genotype, not a female.
3. Option 3: [tex]\(X^R X^r\)[/tex]
- This combination has two X chromosomes.
- It contains two different alleles ([tex]\(X^R\)[/tex] and [tex]\(X^r\)[/tex]), making it heterozygous.
- This fits the criteria for a female who is heterozygous for a sex-linked trait.
4. Option 4: [tex]\(X^R X^R\)[/tex]
- This combination has two X chromosomes.
- It contains two identical alleles ([tex]\(X^R\)[/tex] and [tex]\(X^R\)[/tex]), making it homozygous.
- This does not fit the criteria for being heterozygous.
### Conclusion
Based on the analysis, the allele combination that represents a female who is heterozygous for a sex-linked trait is [tex]\(X^R X^r\)[/tex].
Thus, the correct answer is:
[tex]\[ X^R X^r \][/tex]
Thanks for using our service. We aim to provide the most accurate answers for all your queries. Visit us again for more insights. Thank you for visiting. Our goal is to provide the most accurate answers for all your informational needs. Come back soon. Stay curious and keep coming back to Westonci.ca for answers to all your burning questions.