A) Calculate genotype frequencies of RR; Rr and rr in the population.      B) Calculate the allele frequencies of R and r in the population.

In mangoes wide leaf and narrow leaf are alternative characters and wide (W) is dominant to narrow (w). Red stem  and green stem  are another pair of characters with red (R) dominant to green (r) .       A true breeding wide, green mango plant was crossed with a true-breeding narrow, red plant and the F1 plants were interbred. 337 F2 plants were produced with the following phenotypes; 202 wide, red;      69 wide, green;      15 narrow, green;     51 narrow, red. What probability is associated with the Chi Sq value you obtain?

In pea plants yellow seed color, (GG) and round seed shape (WW) seeds are dominant traits, while green color or (gg) wrinkled shape (ww) seeds are recessive traits. You cross a pure breeding plant with yellow wrinkled seeds to a pure breeding plant with green round seeds to generate F1s. When you perform a reciprocal cross you get the same results. You take an F1 male and an F1 female and generate an F2 population. Of all the F2 offspring you count 18 that have yellow wrinkled seeds. Based on this information, how many F2 offspring do you expect to display only dominant traits? a) 72 b) 54 c) 18 d) 24 e) 6

Tomato Plants In tomato plants, round fruit (R) is dominant to oval fruit (r). Pure breeding plants with red and round fruit (FFRR) were crossed to pure breeding plants with yellow and oval fruit (ffrr). The red and round F1 progeny were then testcrossed to plants that were homozygous recessive for both genes (ffrr) with the following results: Phenotypes Number of Offspring Red and round 2 255 Red and oval 290 Yellow and round 310 Yellow and oval 2 145 Part A: Record the phenotypes and the phenotype ratio in lowest terms. Part B: Convert the expected phenotypic ratio from Part A into the expected probability for each of the four phenotypes and record them in the table below. Calculate the probability for each of the four phenotypes observed in the cross from the data presented at the beginning of the question by dividing the number of progeny in each class by the total number of progeny and record these in the table below. (Probability = Number of Progeny in Phenotype…

Tomato Plants In tomato plants, round fruit (R) is dominant to oval fruit (r). Pure breeding plants with red and round fruit (FFRR) were crossed to pure breeding plants with yellow and oval fruit (ffrr). The red and round F1 progeny were then testcrossed to plants that were homozygous recessive for both genes (ffrr) with the following results: Phenotypes Number of Offspring Red and round 2 255 Red and oval 290 Yellow and round 310 Yellow and oval 2 145 Complete a Punnett square to determine the expected testcross progeny on the basis of Mendel’s Law of Independent Assortment. Record the phenotypes and the phenotype ratio in lowest terms.

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