genmes and ellles Flashcards
(9 cards)
1
Q
What is a gene?
A
A segment of DNA that codes for a trait.
2
Q
What are alleles?
A
Different forms of a gene.
3
Q
How many alleles do organisms inherit for each trait?
A
Two alleles; one from each parent.
4
Q
What are the two types of alleles for a trait?
A
Dominant and recessive alleles.
5
Q
How is a dominant allele represented?
A
Always represented by a capital letter.
6
Q
What does a dominant allele do?
A
Covers up the recessive allele for a given trait.
7
Q
How is a recessive allele represented?
A
Always represented by a lowercase letter.
8
Q
When is a recessive trait expressed?
A
Only when there are two copies of the recessive allele.
9
Q
A
