Two pureline plants of genotype AB/AB (Parent 1) and ab/ab (Parent 2) are crossed. The F1 hybrid is then testcrossed. If both genes are closely linked with no crossover, what fraction of the F2 progeny will be phenotypically like either of the two parent plants? O 75% 50% 25% O 100%

The image shows a pair of homologous chromosomes from a single parent before gamete production. M1 and M2 are maternal chromosomes, while P1 and P2 are paternal chromosomes. Two traits are shown: D represents seed color (D – green, d – yellow), while F represents flower color (F – purple, f – white). These two traits follow the patterns of basic Mendelian genetics. During crossing-over between the M2 F allele and the P1 f allele, a mutation occurred and the portion of P1 did not reattach to the chromosome. Which of the following explains what would happen to the proportion of white flowers in a population resulting from this mutation? A - There would be an increase in the proportion of white flowers because the f allele is distributed to more gametes. B - There would be a decrease in the proportion of white flowers because the f allele is not distributed to as many gametes. C - There would be an increase in the proportion of white flowers because the f allele would not be masked by the…

wwwwwwww wwwwwwwww If the progeny of the cross aaBB x AAbb is testcrossed, and the following genotypes are observed among the progeny of the testcross, what is the frequency of recombination between these loci? AaBb 135 wwwwwwww Aabb 430 www aaBb 390 wwwwwwww aabb 120 wwwwww

If a red color flower (R) crosses with a blue flower (b), the result is purple flower (Rb). If the first generation is self crossed what will be phenotype in F2 generation?