Mendelian Genetics Flashcards
1
Q
What are the 2 types of Variation? Describe them
A
- Continuous Variation: due to an infinite amount of traits (spectrum)
- Discrete Variation: only two or few traits to a given character
2
Q
What is the law of independent assortment?
A
Alleles of different genes assort independently of each other
3
Q
Two types of syndromes/diseases due to improper segregation of sex chromosomes?
A
- Turner’s Syndrome: XO
- Klinefelters: XXY
4
Q
What does hemizygous mean?
A
Only having one allele for a certain characteristic.
Example: males and colour blindness gene
Example 2: Sheida and being ugly
5
Q
What affects recombination rate?
A
- Recombination depends on distance!
- The further apart tow genes are on a chromosome, the higher chance they will recombine.
- If two genes are close on a chromosome, then they are very closely linked
6
Q
What does polygenic/multigenic mean?
A
When multiple genes may contribute to a trait. This means that someone could have two penises/vaginas.
7
Q
What does Epistasis mean?
A
When the expression of a gene is affected by the expression of one or more independently inherited genes.
