Question

Species 1 is diploid (2n = 4) with chromosomes AABB, a related Species ll is diploid (2n-4) with chromosomes CCDD. Indicate the chromosomes that would be found in individuals with the following chromosome mutations. a. an autotetraploid of Species I b. an allohexaploid c. risomic for chromosome B d. a nullisomic for chromosome C

Answer 1

Auto fetwaploid is defi ned as the doubling d whole c 。masemes within an agonism The numbe o chromesemes be comes 2n +2n a) a ploid is desi ned as from ths mutaten lbe AA88+ AABB - AAAA 8888 Allo tetra pleicd is deinel as sanotion hybd Chremosomes xem di sterent eigasms Ceme teyether ard tetrap leid. The Chsomesome number becomes 2m+ 2n'. Ih this conditien, the chromosome l be Risemic condition arises de to fomaten of an exta copy of speutic ckiemosome. The Chiomosome mumber becemes 2n+l Risomic condition fer chromesome 8 will yie& AA B8B d) Nulhsomic refer to the cemplete absence of vallisơmic refers a set o cAromoseme. Here, the num ber oft ckromoseme be comes 2n-2 Nullisomic muttien for chremesome 8 ill give AA.