Mendel’s four hypotheses
, Mendel?s theory proposed that dominant and recessive genes exist in pairs (e.g.,
YY, rr) and that the genes of a pair separate and pass independently to egg and sperm cells (i.e., the
gametes). [ Then during fertilization, the separated genes (e.g., Y, r) recombine randomly in zygotes
(i.e., in fertilized eggs). To test these theoretical claims (we will call them scientific hypotheses
asthey are part of Mendel?s more general and complex inheritance theory), Mendel conducted a twopart experiment with pea plants. ]
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