Genetics 1
Father of genetics, studied peas
Gregor Mendel
A gene that is expressed over recessive
Dominant
A random permanent change in an organisms DNA
Mutation
Give an example of a heterozygous gene pair
Rr
Pink flowers from white and red parent genotype is an example of what?
Incomplete dominance
Crossing-over and Independent assortment
Reproduction where offspring are different to the parents
Sexual reproduction
The physical trait/appearance of an organism
Phenotype
Where are chromosomes located
In the cell nucleus
The two letter code describing an organisms genes
Genotype
Alternative versions of a gene
Allele
Two same genes for the same trait
Homozygous
What process comes before mitosis
DNA replication
Meiosis produces...
4 unique daughter cells
A gene that is covered up when a dominant gene is present
Recessive
Two different genes for the same trait
Heterozygous
How many chromosomes do sperm and egg cells have?
23 chromosomes
DNA stands for what?
deoxyribonucleic acid
For a change in DNA to be passed onto offspring it needs to occur in the...
Gametes
What is an example of incomplete dominance?
Green eyes, hair texture, pink flowers
What is the purpose of meiosis?
To create sperm and egg cells
What are two main roles of mitosis?
Growth and Repair
Mitosis produces...
2 identical daughter cells
Why is genetic diversity important?
Adapt, survive environmental conditions, reproductive fitness
Give an example of a mutation that causes offspring to not be viable after birth
Patau Syndrome, Trisomy 16