pheno variable

Question 1

does everyone suffering the same genetic disease will have identical symptoms, the same disease course and prognosis?

Answer 1

no

Question 2

are their sub classes to a disease

Answer 2

yep

Question 3

reasons for different effects of dieases

Answer 3

The effect of environment ( factors external to the patient.)
The same disease can affect the genders differently
Interaction with other genes
Different mutations in the same gene can lead to different phenotypes
Unstable mutations

Question 4

what are trinucleotide repeat disorders

Answer 4

region of three repeated nucleotides in the genome increases in number during DNA replication
repeats increases, it reaches a thresehold above which they are no longer stable during DNA replication

Question 5

what can it cause

Answer 5

the protein function

Question 6

what does a greater number of repeats lead to

Answer 6

and a greater number of repeats results in a more severe phenotype.