Exam 2 Practice (1)

°A population of randomly-mating mice contains 35% white mice. The color white is caused by the double recessive genotype, “aa”. Calculate the allelic and genotypic frequencies for this population.   °In a flock of chickens, rose comb is dominant over the single comb. Approximately 60% of the chickens in the flock have rose comb, while 40% have a single comb. Determine the expected frequency of: a. q2 b. q c. p d. p2 e. 2pq

77)Each graph below shows the frequency of the A allele in six simulated populations (each line in a graph) over 500 generations. Each of the six simulations within a graph were done with the exact same settings of relative fitness among the genotypes and population size BUT these settings differed between the four graphs. Which graph shows a situation in which the effect of selection is the highest relative to the effect of drift? C   D   A   B

A population in Hardy Weinberg Equilibrium has 300 individuals and 25% of these are recessive.  What is the frequency of p?   a. .75   b. 75   c. .5   d. .25

Assume two alleles A1 and A2 with known frequencies e.g. p (A1) = 0.7, q (A2)= 0.3 What would be the frequency of the A1A2 ? a. 0.49 b. 0.09 c. 0.21 d. 0.42

In a Hardy-Weinberg population with two alleles, G and g, that are in equilibrium, 40% of the alleles are recessive. What percentage of the population is homozygous for the dominant allele? a. 9% b. 36% c. 70% d. 60% e. 30%

Assuming a Hardy-Weinberg equilibrium, 21% of a populationis homozygous dominant, 50% is heterozygous, and 29% ishomozygous recessive. What percentage of the next generationis predicted to be homozygous recessive? a. 21%                   d. 42%b. 50%                   e. 58%c. 29%

D. 1/4 3. In a Hardy-Weinberg equilibrium population of 250, with two alleles 's' and 'S' having allele frequeney 0.7 and 03; what would be the total number of individuals can be expected to be heterozygous (sS)? A 105 B 42 C 52 D 21

A very large population of randomly-mating laboratory mice contains 35% white mice. White coloring is caused by the recessive genotype, "aa". Calculate the frequency of the homozygous dominant genotype (AA). * a. 5.9 % b. 17% c. 35% d. 41% e. 48% f. 59% g. 65% h. none of the choices A very large population of randomly-mating laboratory mice contains 35% white mice. White coloring is caused by the  recessive genotype, "aa". Calculate the frequency of the dominant trait.* a. 5.9 % b. 17% c. 35% d. 41% e. 48% f. 59% g. 65% h. none of the choices

What is the expected frequency of heterozygotes in a population with allelic frequencies xand y that is in Hardy–Weinberg equilibrium?a. x + yb. xyc. 2 xyd.( x − y)2

In a population that is in Hardy-Weinberg equilibrium, there are two possible alleles for a certain gene, A and a. If the frequency of allele A is 0.4, what fraction of the population is heterozygous? O A. 0.40 B. 0.60 C. 0.16 D. 0.48

In a population of red (dominant allele) or white flowers in Hardy–Weinberg equilibrium, the frequency of red flowers is 91%. What is the frequency of the red allele? a. 9% b. 30% c. 91% d. 70%

1.The effect of chance on the structure of a population gene pool is known as   a. gene flow b. genetic variance c. the gene pool d. genetic drift   2. The alleles of all individuals within a population are referred to as the Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a. gene flow b. genetic variance c. gene pool d. genetic drift

In a population of 1000 baby kitties, 40 are white because of a recessive allele (b). Non-white cats are either homozygous dominant (BB) or heterozygous dominant (Bb). What is the frequency of heterozygous kitties in the population?A. 0.2B. 0.32C. 0.8Please show all the work!

Here C has 2 alleles C1 and C2 and same with D allele. C1D1 are the haplotypes for both of the populations:   C1 D1 C1D1     First Population 0.3 0.5 0.45 Second Population 0.5 0.2 0.15   1. find the linkage disequilibrium between C and D in first and second population 2. does first population has fewer or mare haplotypes than expected 3. Cosider the recombinantion fraction as 0.1. How many generation will linkage disequilibrium in first population take to be equal to the current value in second population

In a population of 500 sheep in Hardy-Weinberg equilibrium, 80 individuals have black wool while the remainder have white wool. White wool (W) allele dominant over black wool (w) allele. Whats is the frequency of the heterozygous individuals in this population? Lüffen birini seçin: O a. 0.36 O b. 0,64 O c. 0,48 O d. 0,4

1.) Consider flower color in a hypothetical population of 7,000 flowers, red flowers (4,000), blueflowers (2,000) are dominant over pink flowers. If there are 1,000 pink flowers, find thefollowing:a. Frequency of dominant (red flower) alleleb. Frequency of recessive (pink flower) allelec. Frequency of each genotype (homozygous dominant, homozygous recessive,heterozygous)d. Make a Punnett square and use the rule of multiplication.

1)A population of 500 individuals has 231 homozygous dominant individuals, 218 heterozygotes, and 51 homozygous recessive individuals. Determine the frequency of the recessive genotype and frequency of the recessive allele, respectively. a. Frequency of Recessive Genotype  Frequency of Recessive Alleles 0.32 0.10 b. Frequency of Recessive Genotype  Frequency of Recessive Alleles 0.10          0.32 c. Frequency of Recessive Genotype          Frequency of Recessive Alleles 0.90          0.10 d. Frequency of Recessive Genotype  Frequency of Recessive Alleles 0.68 0.32   2)A rabbit warren has 300 individuals. The coat colour of rabbits is expressed through incomplete dominance. The coat colour can be dark brown, light brown, or white.There are 81 dark brown rabbits, 150 light brown rabbits, and 69 white rabbits. Assume that all of the conditions are met for a population in Hardy–Weinberg equilibrium.What is the light brown genotype frequency,…

E13. An animal breeder had a herd of sheep with a mean weight of 254pounds at 3 years of age. He chose animals with a mean weight of281 pounds as parents for the next generation. When these offspringreached 3 years of age, their mean weight was 269 pounds.A. Calculate the narrow-sense heritability for weight in this herd.B. Using the heritability value that you calculated in part A, whatmean weight would you have to choose for the parents to getoffspring that weigh 275 pounds on average (at 3 years of age)?

In a hypothetical species of mice, the shaggy gene determines hair length. S is the dominant allele and confers the short hair phenotype. Homozygous ss individuals have long hair. There are 422 long-haired mice and 278 short-haired mice in the population. What is the frequency of the SS genotype? a. 0.60      b. 0.05           c. 0.40              d. 0.22

8. Use the Hardy-Weinberg Equations to answer the questions below. (Assume there are only 2 alleles in the population for the given trait.) docx The dominant allele frequency is 74%. What is the recessive allele frequency? b. What are the genotype frequencies for the alleles in question 8A above? chomp (1)

A population has 25 individuals of genotype AA, 25 individuals of genotype aa, and 50 individuals of genotype Aa.  Is this population in Hardy Weinberg equilibrium?  Why or why not? Group of answer choices A. No because p2 + 2pq + q2 does not equal 1 B. Yes because p2 + 2pq + q2 = 1 C. Yes because the genotype frequencies match HW expectations based on allele frequencies D. No because there are more heterozygotes than expected under Hardy Weinberg E. No because there are fewer heterozygotes than expected under Hardy Weinberg