class 12: inheritance II teacher notes Flashcards Preview

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Flashcards in class 12: inheritance II teacher notes Deck (11):
1

dihybrid cross

two characters, each determined by genes at separate loci

2

unlinked

loci are on separate chromosomes, act in this way

3

what is the basis for mendel's principle of independent assortment

unlinked genes

4

principle of independent assortment

alleles at a locus will assort in gametes independetly of the alleles at another locus

5

linked loci

loci located on same pair of chromosomes that don't assort indepednetly

6

when is a 9:3:3:1 PHENOTYPIC ratio expected

when dihybrid cross when crossing individuals heterozygous at both loci and where there is complete dominance at both loci

7

linkage

assort indepndently

8

complete linkage

only two types of games can be produced in absence of crossing over

9

corssing over effects

shuffles genetic material so that we now have some chromatids that contain genetic material that was origianlly only on oneor the other member of a homologous pair

10

recombinant gametes

gametes that have gone through crossing over and contain shuffled chromosomes

11

parental gametes

gametes with orginal unaltered chromosomes

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