Podcast
Questions and Answers
Which of the following statements is true regarding alleles?
Which of the following statements is true regarding alleles?
What is the relationship between genes and chromosomes?
What is the relationship between genes and chromosomes?
How many alleles do we inherit for each gene?
How many alleles do we inherit for each gene?
What is the difference between genotype and phenotype?
What is the difference between genotype and phenotype?
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What is a recessive allele?
What is a recessive allele?
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What is a dominant allele?
What is a dominant allele?
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Study Notes
Alleles
- Alleles are different forms of a gene that exist at a specific locus on a chromosome.
- Each individual carries two alleles for each gene, one inherited from each parent.
Genes and Chromosomes
- Genes are segments of DNA that code for proteins and determine traits, while chromosomes are structures that package and organize DNA within the cell.
- Humans have 23 pairs of chromosomes, with each pair being composed of one chromosome from each parent containing multiple genes.
Inheritance of Alleles
- For each gene, individuals inherit two alleles, one from each parent.
- This means an individual receives one allele from their mother and one from their father for every gene.
Genotype vs. Phenotype
- Genotype refers to the genetic constitution of an organism, encompassing both dominant and recessive alleles present.
- Phenotype is the observable physical or biochemical characteristics of an organism, which result from the interaction of the genotype with the environment.
Recessive Allele
- A recessive allele is one that does not manifest in the phenotype unless two copies are present (homozygous state).
- These alleles can be masked by dominant alleles, meaning their effects are only seen when paired with another recessive allele.
Dominant Allele
- A dominant allele is one that expresses its phenotype even when only one copy is present (heterozygous state).
- Dominant alleles can mask the effects of recessive alleles, influencing the organism's traits even if paired with a recessive allele.
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Description
Test your knowledge on genes and alleles with this quiz! Learn about the basics of genetics and how alleles contribute to the expression of certain traits, such as eye color. Challenge yourself and see how much you know about this fascinating topic!
