60. Long answer questions XI

 

Based on Law of independent assortmentLaw of dominanceLaw of segregation new combinations appear in the F2 generation. It states that when gametes are created, the two components of the allelic pair stay together without mixing, and only one penetrates each gametewhen two homozygous individuals with one or more sets of contrasting characters are crossed, the characters that emerge in the F1 hybrid are dominantif two pairs of hybrid characteristics are combined, one pair of characters separate from the other. It indicates that it does not depend on its chance to be violet or red for the pea seeds to be round or flatit does not depend on its chance to be yellow or green for the pea seeds to be round or wrinkledit does depend on its chance to be yellow or green for the pea seeds to be round or wrinkled. All pairs are separate from each other. There are twofour six types of gametes produced in a dihybrid cross between two round-yellow (RRYY) and wrinkled green (rryy) plants. Each of these is separate from the other. Progeny ratio is round yellow: round green: wrinkled yellow: wrinkled green: 9 : 1 : 3: 19 : 3 : 3: 19 : 3 : 1: 3.