Inheretance And Variation Flashcards
What is heterozygous
Someone that carry’s the allele for the disease, so their children are at risk of getting it
How is a organism genetically engineered?
The dna that you want to insert is cut out with a restriction enzyme
What are mutations?
A change to the base sequence in dna .
What can variation with in a species be caused by?
Environmental variation
Genetic variation
What are sex linked genetic disorders caused by?
Faulty alleles located on sex chromosomes
Which base bonds with C in dna?
G
Which base bonds with A in dna?
T
What is the name for the base A in dna?
Adenine
What is the name for the base T in dna?
Thymine
What is the name for the base C in dna?
Cytosine
What is the name for the base G in dna?
Guanine
What is the shape of DNA
Double helix
Define genotype
An organisms genetic composition
What is phenotype
An organisms observable characteristics due to interactions of the genotype and environment ( which can modify the phenotype)
Define homozygous
Having two identical alleles of a gene eg. GG or gg