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Questions and Answers
What type of chromosome has the same gene for a particular trait?
What type of chromosome has the same gene for a particular trait?
- Polygenic chromosome
- Homozygous chromosome (correct)
- Codominant chromosome
- Heterozygous chromosome
In genetics, what is the term used for a lowercase letter representing a trait?
In genetics, what is the term used for a lowercase letter representing a trait?
- Codominant
- Polygenes
- Incomplete dominance
- Recessive (correct)
What is the term for genes that occupy the same position on homologous chromosomes?
What is the term for genes that occupy the same position on homologous chromosomes?
- Polygenic traits
- Alleles (correct)
- Multiple alleles
- Codominant genes
Which type of gene interaction results in an intermediate phenotype?
Which type of gene interaction results in an intermediate phenotype?
What is the term for having different genes for a particular trait on homologous chromosomes?
What is the term for having different genes for a particular trait on homologous chromosomes?
Which type of chromosome has two different genes for a particular trait?
Which type of chromosome has two different genes for a particular trait?
In the context of blood type, which genotype represents a homozygous individual with blood type A?
In the context of blood type, which genotype represents a homozygous individual with blood type A?
What is the genotype for a person with blood type AB?
What is the genotype for a person with blood type AB?
A person with which genotype would express blood type O?
A person with which genotype would express blood type O?
If a person inherits the genotype AaBB, what would their phenotype be?
If a person inherits the genotype AaBB, what would their phenotype be?
Which of the following genotypes represents a heterozygous individual?
Which of the following genotypes represents a heterozygous individual?
What is the genotype for a person affected by red-green color blindness, an X-linked recessive trait?
What is the genotype for a person affected by red-green color blindness, an X-linked recessive trait?
What term describes the condition where two alleles are both fully expressed?
What term describes the condition where two alleles are both fully expressed?
In the context of the text, what are the genotypic and phenotypic probabilities of crossing two roans?
In the context of the text, what are the genotypic and phenotypic probabilities of crossing two roans?
What is the result of crossing a homozygous dominant yellow gumamela (YY) with a homozygous dominant red gumamela (RR)?
What is the result of crossing a homozygous dominant yellow gumamela (YY) with a homozygous dominant red gumamela (RR)?
What is the phenotypic probability of crossing a homozygous dominant black rabbit (BB) with a homozygous recessive white rabbit (ww)?
What is the phenotypic probability of crossing a homozygous dominant black rabbit (BB) with a homozygous recessive white rabbit (ww)?
In the context of genetics, what term describes an individual with two identical alleles for a particular trait?
In the context of genetics, what term describes an individual with two identical alleles for a particular trait?
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Study Notes
Chromosome Types
- Autosomes are chromosomes that have the same gene for a particular trait.
- Homologous chromosomes have genes that occupy the same position.
Gene Interactions
- Co-dominance is the type of gene interaction that results in an intermediate phenotype.
- Co-dominance is a condition where two alleles are both fully expressed.
Genotype and Phenotype
- Homozygous individuals have two identical alleles for a particular trait.
- Heterozygous individuals have two different genes for a particular trait on homologous chromosomes.
Blood Type Genetics
- The genotype AA or AO represents a homozygous individual with blood type A.
- The genotype AB represents a heterozygous individual with blood type AB.
- The genotype OO represents a homozygous individual with blood type O.
- If a person inherits the genotype AaBB, their phenotype would be blood type AB.
X-Linked Recessive Traits
- The genotype XrXr represents a person affected by red-green color blindness, an X-linked recessive trait.
Cross-Breeding Probabilities
- The genotypic and phenotypic probabilities of crossing two roans depend on the genotype of the parents.
- Crossing a homozygous dominant yellow gumamela (YY) with a homozygous dominant red gumamela (RR) results in offspring with a yellow-red mixture phenotype.
- Crossing a homozygous dominant black rabbit (BB) with a homozygous recessive white rabbit (ww) results in offspring with a black phenotype.
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