inheritance Flashcards
(14 cards)
allele
different forms of the same gene/ variation of the gene
genotype
the combo of alleles determined by letters
homozygous
inherited two alleles that are the same AA or aa
Heterozygous
inherited alleals that are different Aa
phenotype
physical trait that they display determined by genotype
complete dominance
when atleast one alleles are dominant
punnet square steps
- state alleles B=brown b=brown
- write the cross your doing brown eyes (Bb) x blue eyes (bb)
- draw punnet square
4.phen and geno types ratios and probiility
Incomplete Dominance
where neither allele is dominant there is now a blended phenotype (both alleles have different letters RR WW = RW
CO Domiance
where both aleals are equally dominant both traits will be shown ( white and black spots)(RR WW = RW
Sex Linkage
any gene found on a sex chromosome is a sex linked trait
species
organisms that can successfully interbreed to produce viable and fertile offspring
natural selection
acts on phenotypes of individuals so that some survive and reproduce while others don’t. through this favourable traits are inherited and are passed on
VEST
V- populations have variation between organisms
E- Environmental factors act on populations
S-individuals with most suited phenotype are selected therefore survive and reproduce T- Over time the alleles are passed onto generation therefore population evolves
Evolution
is the change in the characteristics of a species over many generations