Pedigree Flashcards
1
Q
Definition of DOMINANT.
A
An inherited characteristic that is determined by a dominant allele that is usually seen (represented as a capital letter)
2
Q
Definition of RECESSIVE.
A
An inherited characteristic that is determined by a recessive allele that is usually unseen (represented as a lower case letter)
3
Q
What traits of individuals is based on their genes?
A
- Earlobes
- Forelock
- Hairline
- Dimples
- Thumb
- Pinky
- Tongue rolling
4
Q
What is the symbols of a pedigree?
A
- Square = male
- Circle = female
- One line between people = mating
- Two lines between people = mating with close relatives
- Roman numerals = generations
- Numbers = birth order
- Triangle between people = identical twin
- Triangle without bottom line between people = fraternal twins
- Shaded = affected
- Half shaded = heterozygous individuals
- Crossed off = deceased
- Diamond = sex unknown
5
Q
Definition of HETEROZYGOUS
A
A pair of genes where one is dominant and one is recessive
6
Q
Definition of HOMOZYGOUS
A
A pair genes where they are both the same (ex. both are recessive)
