Mendelian genetics Flashcards
How are mutations detected(2)
genotypes and phenotypes
If an organism is diploid how many strands will you see on a electrogelphoresis
two
variants
differences in gene sequences
locus
place where a gene is located
Allele
different versions of a gene
Law of segregation
alleles of a given locus segregate into separate gametes
What happens according to the law of segregation in the phenotype of the F1 generation?
dominant visible
What happens according to the law of segregation in the phenotype of the F2 generation
recessive visible
what does a self cross reveal
phenotype ratios
self cross
crosses itself with itself
testcross
crosses it with the recessive trait to reveal parent
Expected F2 ratio from two homozygous seeds with two genes
9,3,3,1
independent assortment
random alignment of chromosomes during anaphase
What is the ratio of phenotypes for a AaBb x AaBb cross?
9,3,3,1
Central Dogma
DNA provides instructions for producing proteins
Active gene products
present between every genotype and genetic phenotype
Blood types
based on enzymes that modify membrane proteins
ABO gene encodes
glycosyltransferase
Mutations in melanin biosynthesis
block melanin production
Eye color is
determined by the amount of melanin in your iris