Genetics Flashcards Lecture #2 and 3
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15 Terms
Back Crosses
Crosses between F1 and parent generation
test crosses
between recessive and dominant phenotypes
Multiplication rule
probability of independent possibilites being realized simultaneously
addition rule
probability of 1 or 2 possibilities is the sum of the separate properties
How many gametes are produced in a trihybrid cross: PpTtSs x PpTtSs?
8
How many genotypes are produced in a trihyrbid cross PpSsCc x PpSsCc
27
How many phenotypes are produced in a trihybrid cross PsSsCc x PpSsCc
8
What is pedigree analysis used for?
Determination of individual genotypes and mode of transmission for gene traits
How many different gametes can be formed by an organism that is homozygous for three and heterozygous for two genes?
4
Variable expressivity
refers to genes that are expressed to different degrees in different organisms
