Definitions Flashcards
1
Q
What is a chromsome?
A
- a long section of DNA coiled around histones that is made up of many genes
2
Q
What does homolgous mean?
A
- a pair of chromosomes that carry the same gene but different alleles
3
Q
What is a gene?
A
- a section of DNA that codes for a particular polypeptide
4
Q
What is a locus?
A
- the position of a gene on a chromosome
5
Q
What is an allele?
A
- an alternative version of a gene
6
Q
What is a genotype?
A
- the combination of alleles that an organism has for a particular trait
7
Q
what is a phenotype?
A
- the observable characteristics of an organism
8
Q
what is dominant?
A
- allele that is always expressed if present
9
Q
what is recessive?
A
- allele that only expressed if there is no dominant allele present.
10
Q
What is homozygous?
A
- a genotype that has two of the same allele for a gene
11
Q
What is a heterozygous?
A
- a genotype that has two different alleles for a gene.
