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26 terms

Heredity

STUDY
PLAY
What is heredity?
passing of DNA
Gregor Mendel
Austrlian monk
father of genetics
7 charateristicsa of a pea plant
Characteristics
feature that has differnt forms of populations
Traits VS. Characteristics
Traits-hair color
Characteristics-brown, blue,red, blonde
True Breeding
always produces offspring with the same traits-asexual
Gregor Mendels Discovery
the recessive trait disappears in 1 generation,in the 2nd generation it comes back
Mendel
hypothesized that each plant must hvae 2 heritable factors for each trait one form each parent
Factors
segments of DNA known as genes
Genes
segments of DNA
Alleles
differnt versions of genes
Dominat
uppercase letter
Recessive
lowercase letter
Example
BB-dominant
Bb-dominat
bb-recessive
Heterozygous
1 dominant and one rescessive
Homozygous
same allele
Genotype
are your actual genes
Phenotype
physcial characteristics- observable traits
Domiant
contributes to the phenotype if one or two copies are present in the genotype
Recessive
allele contributes to the phenotype if 1 or 2 copies are present
Complete Dominance
when 1 chromosome contains a dominat allele and the other contains a rescessive, the dominat allel determines the phenotype
Genes 2
1 gene influeneces one or more traits
Enviorment
the enviorment can influnece an organisms phenotype
Traits
incomplete domiance and codomiance 1 trait is not completely domiant over another
Incomplete Dominance
each allele in a heterzygous indiviual influences the phenotype
{a blend of both types}
Codominance
both of the alleles in a heterozygous indiviual contibutes the phenotype
Codominance 2
blood type is an example