Genetics And Evolution Flashcards
Is there variation between all species
Yes genetic
How can variation happen
Environment
Genetics
Both
What can a gene be
Monogenic - discrete data, represented in bar charts
Polygenic - continuous, histogram
What is monogenic
A characteristic caused by one gene e.g eye colour
What is polygenic
A characteristic caused by more than one gene e.g height
What is a chromosome
Found in the nucleus and is made of a chemical called DNA
What is a gene
A short section of DNA
How many chromosomes do we have in our body
46
23 in sex cells
What is 1 cm in micro metres
10000
What are alleles
Different versions of the same gene
How many alleles do you inherit
2
1 allele from each parent
What are dominant alleles
They are always expressed
Even if one parent gave the allele they would get it
What are recessive alleles
Alleles that can only be inherited of both parents have the gene
What is the connection between gene, chromosomes and alleles
Alleles are different versions of genes which make up chromosomes
