Variation And Inheritance 2.5 Flashcards
What is discrete variation
It can divide up to two or 4 distinct groups
It’s very distinct!!!!!!!!
What are the types of variation
Discrete variation and continuous variation
Give examples of discrete variation
Blood group
Eye colour
Hair colour
What is continuos variation
Shows variation, big range between them doesn’t fall into distinct groups
Give examples of continuous variation
Body mass
Height
Resting heart rate
What is phenotype
The physical gene
What is genotype?
The gene for example TT
What does homozygous mean?
It means it’s just one allele
So like it could be all dominant or all recessive
What does heterozygous mean?
Means it is mixed like it could be dominant and recessive
What are alleles
It could be dominant or recessive
Forms of a gene
What would be the predicted ratio?
3:1
Why might the results not be the oredicted ratio? (Variation and inheritance)
Fertilisation is a random process. It is purely by chance that determined which of the gametes produced will actually be involved in fertilisation
