Question

In: Biology

Flower color in buffalo clover is either white or some shade of pink to red. Pollen...

Flower color in buffalo clover is either white or some shade of pink to red. Pollen from a red individual was applied to white flowers in 1999. This seed was germinated in 2000 and four red plants were obtained in the progeny. These four red plants were allowed to self pollinate in summer 2000 to produce the next generation. Populations of progeny from each of the four plants were grown in the greenhouse in spring 2001 and the following data were obtained. Propose a hypothesis and calculate a Chi Square for each plant and the pooled data, and determine if these data fit your hypothesis.

Cross Plant    Red   White

6/2X10/4 #1   21   8

6/2X10/4 #2 53 18

6/2X10/4 #3   49 18

6/2X10/4 #4    60   21

Pooled            183 65

Solutions

Expert Solution

As we can see from the result of F1 cross that ratio of F2 generation population is 3:1:; Red: White

Plant 1 Observed o Expected e Deviation d (Observed- expected) Deviation square d2 d2/e
Red 21 21.75 -0.75 0.5625 0.025862
White 8 7.25 0.75 0.5625 0.077586
Total 29 0.103448
Plant 2 Observed o Expected e Deviation d (Observed- expected) Deviation square d2 d2/e
Red 53 53.25 -0.25 0.0625 0.001174
White 18 17.75 0.25 0.0625 0.003521
Total 71 0.004695
Plant3 Observed o Expected e Deviation d (Observed- expected) Deviation square d2 d2/e
Red 49 50.25 -1.25 1.5625 0.031095
White 18 16.75 1.25 1.5625 0.093284
Total 67 0.124378
Plant 4 Observed o Expected e Deviation d (Observed- expected) Deviation square d2 d2/e
Red 60 60.75 -0.75 0.5625 0.009259
White 21 20.25 0.75 0.5625 0.027778
Total 81 0.037037
Pool data Observed o Expected e Deviation d (Observed- expected) Deviation square d2 d2/e
Red 183 186 -3 9 0.048387
White 65 61.5 3.5 12.25 0.199187
Total 248 0.247574


Since there are two alleles which are involved in the cross so the degree of freedom will be 2-1 = 1.

For df =1 the 5% level of significance, the value is 3.64. which allow us to accept the hypothesis and put data fits in Mendel's monohybrid heterozygous cross.

gladiator answered 1 year ago
Next > < Previous

Related Solutions

In the shrub Ixococ meloites, red flower color is incompletely dominant to white flower color. If...
In the shrub Ixococ meloites, red flower color is incompletely dominant to white flower color. If a true-breeding plant with red flowers is crossed to a true breeding plant with white flowers, what would be the phenotype of the F1 plants? a. The plants will all have red flowers. b. The plants will all have white flowers. c. The some of the flowers on an F1 plant will be red and other flowers on the same plant will be white....
n the shrub Ixococ meloites, red flower color is incompletely dominant to white flower color. If...
n the shrub Ixococ meloites, red flower color is incompletely dominant to white flower color. If a true-breeding plant with red flowers is crossed to a true breeding plant with white flowers, what would be the phenotype of the F1 plants? a. The plants will all have red flowers. b. The plants will all have white flowers. c. The some of the flowers on an F1 plant will be red and other flowers on the same plant will be white....
n the shrub Ixococ meloites, red flower color is incompletely dominant to white flower color. If...
n the shrub Ixococ meloites, red flower color is incompletely dominant to white flower color. If a true-breeding plant with red flowers is crossed to a true breeding plant with white flowers, what would be the phenotype of the F1 plants? a. The plants will all have red flowers. b. The plants will all have white flowers. c. The some of the flowers on an F1 plant will be red and other flowers on the same plant will be white....
1.      In snapdragons, red flower color (CR) is incompletely dominant to white flower color (CW). The...
1.      In snapdragons, red flower color (CR) is incompletely dominant to white flower color (CW). The heterozygote has pink flowers. Normal broad leaves (LB) are incompletely dominant to narrow, grass-like leaves, (LN). The heterozygote has an intermediate leaf width. If a red-flowered, narrow-leaved snapdragon is crossed with a white-flowered broad-leaved one, what will be the phenotypes in the F1and F2generations, and what will be the proportions of the different classes?        (Draw a branching diagram to provide the answer)
Assume you are studying some species of flower that comes in three different colors: red, pink,...
Assume you are studying some species of flower that comes in three different colors: red, pink, and white. You know that color is determined by a single locus with two alleles with incomplete dominance. You count 124 red flowers, 62 pink flowers, and 30 white flowers. What are the allele frequencies and is the population in Hardy-Weinberg equilibrium? Calculate the χ2 test statistic and p-value.
Assume you are studying some species of flower that comes in three different colors: red, pink,...
Assume you are studying some species of flower that comes in three different colors: red, pink, and white. You know that color is determined by a single locus with two alleles with incomplete dominance. You count 124 red flowers, 62 pink flowers, and 30 white flowers. What are the allele frequencies and is the population in Hardy-Weinberg equilibrium? Calculate the chi squared test statistic and p-value.
In peas the flower color and pollen length genes are very close together on the same...
In peas the flower color and pollen length genes are very close together on the same chromosome. Purple flowers (P are dominant to white (p), and long pollen (L) is dominant to short pollen (l). A true breeding variety of peas with purple flowers and short pollen is crossed to a true breeding variety with white flowers and long pollen. The F1 plants are then self-crossed to produce an F2 generation. a. What is the genotype and phenotype of the...
In a certain species of flower, the red allele for flower color (R) is completely dominant...
In a certain species of flower, the red allele for flower color (R) is completely dominant to the pink allele (r). A completely recessive allele (d) at a second gene on a different chromosome allows pigment (color) to be actually deposited within flowers; the lack of pigment results in white flowers. READ CAREFULLY! (a) What is a possible genotype for a pink flower? ___ ___ ___ ___ (b) What is the probability that a flower that is heterozygous for both...
In four-o-clock plants, red flower color (FR) is incompletely dominant over white flowers (FW) and the...
In four-o-clock plants, red flower color (FR) is incompletely dominant over white flowers (FW) and the heterozygous individuals have pink flowers. a. If a red-flowered plant is crossed with a white-flowered plant, what would be the genotypic and phenotypic frequencies of the F1? b. If two of the F1 individuals were crossed, what phenotypes and in what frequencies would appear in the F2?
A population of ants has a body color that is either red or black. The color...
A population of ants has a body color that is either red or black. The color is a result of one gene, with two alleles: The "B" allele (dominant) produces the black color, while the "b" allele (recessive) produces the red color. The gene system demonstrates complete dominance. The population is in HardyWeinberg equilibrium. In this population there are 38 black ants while there are 162 red ones. Determine the following genotypic and allele frequencies: Genotypic frequencies : Freq *...
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT