15.5 Flashcards
1
Q
Genomic Imprinting
A
A variation in phenotype depending on whether an allele is inherited from the male or female parent.
2
Q
When does genomic imprinting occur? What does it result in?
A
During gamete formation and results in the silencing of a particular allele of certain genes.
3
Q
What are examples of genomic imprinting?
A
- Prader-Willi Syndrome
- Angelman Syndrome
4
Q
Imprinting
A
In each generation, genes are remarked by the parent in the gametes
5
Q
Uniparental Disomy
A
Both copies of a chromosome are from one parent.
6
Q
Examples of X-Linked Recessive Traits
A
- Ichtyosis
- Color-Blindness
- Hemophilia
7
Q
Lethal Genotype
A
Causes death before the individual can reproduce.
8
Q
What kind of gene dose might be lethal?
A
A double dose of a dominant allele.
Therefore, the affected individual is always a heterozygote.
