genes,chromosomes and DNA Flashcards
What does the nucleus contain?
Your genetic material.
how many chromosomes does the human cell nucleus contain?
23 pairs.
What is a gene?
A gene is an instruction for cells to make proteins.
What do genes control?
The development of new characteristics.
What is an allele?
A version of a gene
State two types of proteins
Structural proteins and functional proteins
What is a genotype?
All the genes an organism has.
what is a phenotype?
The characteristics an organism displays.
Some characteristics are controlled by genes and by the environment. Name characteristics that are caused by each
Genes: Dimples, eye colour
Environment: Scars
Name characteristics that are caused by both the environment and genes
Weight, skin colour, intelligence
why are chromosomes in pairs?
chromosomes are in pairs because we get one each from our parents
