Unfortunately, there clearly was a problem with a general hypothesis you to definitely states “family genes A great and you may B are linked” for the reason that there isn’t any perfect anticipate away from what to anticipate regarding research away from a reproduction try
Let us think that a couple of inbred stresses from rats (B6 and you may C3H such as) bring distinguishable alleles (symbolized by b and you may c respectively) at each and every out of two fictitious loci Xy1 and Gh3 because the revealed during the shape 9.dos. An F step 1 hybrid between B6 and C3H would be heterozygous at every locus with an excellent genotype out of Xy1 c /Xy1 b , Gh3 c /Gh3 b . In the event that these loci are linked on a single chromosome, the brand new F step one hybrid will have that homolog towards Xy1 c and you may Gh3 c alleles, while the most other homolog to your Xy1 b and you will Gh3 b alleles. By meaning, linkage means that the fresh F step 1 hybrid will generate a heightened quantity of gametes carrying a parental group of alleles (often Xy1 b Gh3 b otherwise Xy1 c Gh3 c ) than just a great recombinant set of alleles (sometimes Xy1 b Gh3 c or Xy1 c Gh3 b ). (more…)