quiz 10 transmission genetics Flashcards
phenotype
outward appearance
allele
one version of a gene
uppercase letter A
dominant allele
lowercase letter a
recessive allele
genotype Aa
combination of genes/alleles carried
every mendelian cross begins with _______ parents
true breeding
parental variety seen in the f1 progeny is considered the ______ trait
dominant
parental variety that is absent in the f1 progeny is considered the _____ trait
recessive
f2 progeny distribution
3/4 dominant, 1/4 recessive
Po: PP (______ dominant) Pp (______ recessive)
F1: Pp (_______)
F2: PP (_______ dominant) Pp/pP (_______) pp (_____ recessive)
homozygous dominant; homozygous recessive; heterozygous
homozygous dominant; heterozygous; homozygous recessive
A mendelian cross always begins with _________
true breeding parents
There are at least three generations in a mendelian cross - what are the three?
The parental, F1, and F2
The dominant and recessive variations of a trait can be determined with which generation?
F1 generation
What ratio is seen in the F2 generation, what is it indicative of?
3:1 ratio, indicative of the segregation of two alleles
Mendelian theory - what part of mendelian theory challenged preformation?
females and males contribute equally to the offspring - preformation states that every gamete carried a potential child
Mendelian theory - what part of mendelian theory challenged blending?
recessive traits were not irreversibly blended together - blending states that the offsprings characteristics were an average between two parents