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In Mendelian genetics, what does a homozygous genotype mean?

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Question: In Mendelian genetics, what does a homozygous genotype mean?

Options:

  1. Two different alleles for a trait
  2. Two identical alleles for a trait
  3. One dominant and one recessive allele
  4. A trait that is not expressed

Correct Answer: Two identical alleles for a trait

Solution: 

A homozygous genotype consists of two identical alleles for a specific trait, either dominant or recessive.

In Mendelian genetics, what does a homozygous genotype mean?

Practice Questions

Q1
In Mendelian genetics, what does a homozygous genotype mean?
  1. Two different alleles for a trait
  2. Two identical alleles for a trait
  3. One dominant and one recessive allele
  4. A trait that is not expressed

Questions & Step-by-Step Solutions

In Mendelian genetics, what does a homozygous genotype mean?
Correct Answer: Homozygous genotype
  • Step 1: Understand that genes come in different forms called alleles.
  • Step 2: Recognize that alleles can be dominant or recessive.
  • Step 3: Know that a genotype is the combination of alleles an organism has for a specific trait.
  • Step 4: Learn that a homozygous genotype means both alleles are the same.
  • Step 5: Identify that this can be either two dominant alleles (e.g., AA) or two recessive alleles (e.g., aa).
  • Step 6: Conclude that homozygous means the organism has identical alleles for that trait.
  • Homozygous Genotype – A homozygous genotype consists of two identical alleles for a specific trait, either dominant or recessive.
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