Definitions
The study of genes
Each person has about ____ genes
20,000
Who is Mendel?
First person to experiment focused on genetics. Father of genetics
What is a Punnett Square?
A model that represents a cross (breeding event) between two organisms
Acquired traits examples
Knowledge, ideas, skills, weight
Alleles
Different variations of genes
Total of chromosomes
46
two sets of 23
Mendel’s first experiment
Cross pollinated pea plants tall and short
A capital letter
TT is…?
Homozygous
Genotype
Organism’s combination of alleles
Examples of traits
Eye color, hair color, skin color, some illnesses
Results of Mendel‘s first experiment
All tall plants
Symbol for heterozygous
One capital and one lowercase
Tt is….?
Heterozygous
Difference between homozygous and heterozygous
Homozygous - two of the same alleles
Heterozygous - two different alleles
How do genetic disorders happen?
Mutation (change), deletion, translocation, extra or missing chromosomes
Mendel’s second experiment
Cross pollinated offspring from first experiment
Dominant Traits
More likely (Capitol letter)
Height, hair color, eye color
Phenotype
Visible version of traits
Some traits can be picked up in an environment and relationships TRUE OR FALSE
True
Results of second experiment
75% tall 25% short
Recessive Traits
Less likely (lowercase letter)
Genotype
Tt or TT or tt (any letter variation)