20.2 Monogenic Inheritance Flashcards
1
Q
What are the results from a homozygous genetic cross
A
All offspring are heterozygous 100%
2
Q
What are the results from a heterozygous genetic cross
A
1 homozygous dominant
2 heterozygous
So 3 dominant
1 homozygous recessive so 1 recessive
3
Q
What is codominance
A
2 different alleles occur for a gene both of which are equally dominant so both alleles of the gene are expressed in the phenotype
4
Q
What does it mean when a gene has multiple alleles
A
They have more than 2 alleles for a gene
5
Q
What are sex linked genes
A
Genes carried in the sex chromosomes
6
Q
What is haemophilia
A
An example of a sex linked genetic disorder
Blood which clots extremely slowly due to the absence of a protein blood clotting factor
