Ch 11 Mendel and Gene Idea Flashcards
monohybrid cross
waiting between individuals with different alleles. Characters being studied governed by tow or multiple alleles for single locus
dihybrid cross
cross between parents with different alleles for single locus
wild type
gene/characteristic that prevails in natural conditions, Distinct from atypical mutant
mutant
showing effect from mutation
genotype
genetic makeup of cell
phenotype
oservable trait (eye color)
test cross
using homozygous receive phenotype to figure out genotype
blending hypothesis
offspring blend of parent traits
particulate hypothesis
parents pass discrete heritable units (genes)
law of segregation
tow alleles fro heritable character separate during gamut formation and end up in different gametes
*follows single character
law of independent assortment
each pair of alleles segregates independent of each other pair of alleles during gamut formation (dihybrid cross)
*genes closer together are sorted together vice versa
purpose of test cross
to determine if organism is homozygous dominant or heterozygous
what type of genotype in used in test cross?
homozygous recessive
what is testcross
It is a mating in which an individual showing a dominant phenotype is crossed with an individual showing its recessive phenotype
dominance
phenotype of one allele masks contribution of second allele at same locus
