What is an allele in genetics?
A version of a gene at a specific chromosome position.
How many alleles does an individual inherit for each gene?
Two alleles, one from each parent.
What do alleles determine in eye colour inheritance?
Which eye-colour trait an individual obtains.
When is an individual homozygous for a trait?
When the two alleles are the same.
When is an individual heterozygous for a trait?
When the two alleles are different.
What do homozygous and heterozygous describe about alleles?
Whether the two alleles for a trait are the same or different.
What is a dominant trait in genetics?
A trait visible with only one copy of an allele.
What defines a recessive trait?
A trait dominated by a dominant trait.
How are dominant traits represented in genetics?
By capital letters.
How are recessive traits represented in genetics?
By lowercase letters.
What is a genotype in genetics?
A combination of allelic symbols representing alleles for a trait.
What does phenotype refer to?
The physical expression of a trait or characteristic.
What does a Punnett square show about offspring genes?
All gene combinations offspring could inherit and their likelihood.
What is the first step in using a Punnett square?
Combine alleles inherited from both parents.
What does combining parental alleles determine in a Punnett square?
Possible gene combinations and their likelihood in offspring.
What genetic possibility does the course ask students to calculate?
The chance of a child having red hair from specific parental traits.
Teste tes connaissances avec un QCM de 10 questions sur Alleles and Inherited Traits.
1. What is an allele?
2. How many alleles for a gene does an individual typically inherit, and how are they obtained?
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