Genetic Inheritance Flashcards
What are the female sex chromosomes?
XX
What are the male sex chromosomes?
XY
What is a gene?
A small section of DNA on a chromosome
What is an allele?
Different versions of a gene
What is a genotype?
The different alleles present
What is a phenotype?
The characteristics which appear as a result of the alleles
What does homozygous mean?
When there are two copies of the same allele
What does heterozygous mean?
Having two different alleles
What is dominant allele?
The allele which will show in the phenotype even if there is only one copy present
What is a recessive allele?
An allele which will only show in the phenotype if there are two copies present- there are no dominant alleles present
What is a gamete?
A sex cell
What is a chromosome?
Thin structures containing DNA
