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Chapter 16 - Genetics (DNA image (mutations image (caused by mutagens…
Chapter 16 - Genetics
DNA
mutations
Somatic mutation
caused by mutagens
chemical
biological
insertion mutagen
Lethal mutations
Usually kill the plant
can be difficult to detect if it's effect is early
Can die before fertilization
replication
Repair process
Genetic testing types
monohybrid cross (only studies one gene individually)
complete dominance
MOM: Homozygous (white recessive) ww
DAD: homozygous (Red Dominant) Rr
Baby #1: Heterozygous (Red Dominant) Rw
Baby #2: Heterozygous (white recessive) rw
incomplete dominance
MOM: Homozygous (white recessive) ww
DAD: homozygous (Red Dominant) Rr
Baby: heterozygus blend (red with white) Rw
Dihybrid cross
(studies two genes simultaneously)
Results depend on:
Dependent on if they are on different chromosomes or the same one
dependent on the position of genes on the chromosome
Punnett squares!!
Dihybrid cross
Monohybrid cross
Genetic inheritance
depends on dominance/recessiveness
depends on Quantitative Trait Loci
depends on type of inheritance
maternal inheritance
(uni-parental inheritance)
bi-parental inheritance
