olored aleurone in the kernels of c due to the do nant allele R. The recessive a
ID: 47253 • Letter: O
Question
olored aleurone in the kernels of c due to the do nant allele R. The recessive allele r, when homozygous, produces colorless aleu rone. The plant color (not the kernel color is controlled by another gene with two alleles, Y and y. The dominant Y allele results in green color, whereas the homozygous presence of the recessive y allele causes o appear yellow. In a testcross between a plant of unknow genotype and phenotype and a plant that is homozygous recessive for both traits, the following progeny were obtained 88 Colored, green 12 Colored, yellov Colorless, green 92 Colorless, yellow Explain how these results were obtained by determining the exact geno- type and phenotype of the unknown plant, including the precise arrangement of the allleles on the homologs. with two pairs of genes involved (Plp and Zlz), a testcross (ppzz) with an organism of unknown genotype indicated that the gametes produced were in the following proportions: PZ, 42.4%; Pz, 6.9%; pZ, 7.1%; pz, 43.6% Draw all possible conclusions from these data. either red or yellow, and fruit shape is either s n a certain plant, fru oval or long. Red and oval are the dominant traits. Two plants, both he erozygous for these traits, were testcrossed, with the following results. Progeny Plant B Plant A Phenotype 46 red, long 44 yellow, oval 43 red, oval 47 yellow, long 00 100 Determine the location of the genes relative to one another and the genotypes of the two parental plants Two plants in a cross were each heterozygous for two gene pairs (AblaB) whose loci are linked and 25 mu apart. Assuming that crossing over oc curs during the formation of both male and female gametes and that the A and Balleles are dominant, determine the phenotypic ratio of their offspringExplanation / Answer
answer 2:- this is the data which shows presence of all types of gametes in the results and as the questions tells us that thi sis the result of test cross so we can infer that the parents are hetrozygous in nature otherwise all these gametes would not have been produced
answer 3:- if R denotes red and r denoted yellow then Rr
L denotes long and l denotes oval
THEN PARENTS GENOTYPE
RrLl is the answer
Answer 4: 3:1 is the answer because it will be a dihybrid cross
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