Genetic Disorders Flashcards
1
Q
What are the effects of cystic fibrosis?
A
> it affects the cell membranes, causing a thick sticky mucus to form
> affects the pancreas and the process of digestion
> affects the breathing system causing frequent infections in the lungs.
2
Q
What is cystic fibrosis caused by?
A
A recessive allele
3
Q
Define genotype
A
The combination of alleles to determine a characteristic.
4
Q
Define phenotype
A
The characteristic expressed by the genotype
5
Q
What does heterozygous mean?
A
The two alleles for a genotype are different
> the characteristic is determined by the dominant allele
6
Q
What does homozygous mean?
A
The two alleles for the genotype are the same
> the phenotype can be determined by either the dominant or recessive allele
7
Q
What is polydactyly caused by?
A
> dominant allele
