Unit 5 Essay Flashcards
Mendel’s 1st concept
there are alternate alleles for each trait
Mendel’s 2nd concept
offspring inherits one allele from each parent
2 alleles at a locus may be identical or different
Mendel’s 3rd concept
the dominant allele will mask the recessive allele
Mendel’s 4th concept
law of segregation
sperm or egg cell gets only one of the two alleles present in somatic cells
law of segregation
two alleles for a heritable character separate during gamete formation
end up in different gametes
when does allele segregation occur?
anaphase II of meiosis
what accounts for the 3:1 ratio of Mendel’s F2 generation?
law of segregation
law of independent assortment
each pair of alleles segregates independently during gamete formation
genes close to each other on the same sister chromatid
tend to be inherited together
less likely to cross over
genes that are farther away from each other
greater recombination frequency
morgan’s conclusions from experimenting on chromosomes
specific genes are on specific chromosomes
morgan’s conclusions from fruit fly mating experiments
sex linked traits are located on the x chromosomes
linked genes
genes located on the same chromosome tend to be inherited together
offspring should theoretically resemble parental pheontype
recombinant phenotypes
genes can be linked, but the linkage is incomplete
crossing over of homologous chromosomes
linkage map
genetic map of a chromosome based on recombination frequencies
