Principles of Biology II Quiz #2 Makeup
Biological Science 107 Spring 2001
Dr. Ralph Harnishfeger
Name: ___________________________ Seat Number _____Score: _______
Please read each question carefully before answering. Do not leave a space blank if you know part of the answer, partial credit will be given, as appropriate. The point value of a correct answer to each question is given in (), ten (10) points total for this quiz. You may wish to show your calculations where appropriate.
1. Why did we use an ear of corn in our studies of Mendelian inheritance? (1)
2. Parents each have the genotype aa. Describe the kinds of gametes which can be produced and the probability of producing them. (2)
3. What is the probability rolling three dice simultaneously and have one dot come up on the top of all three? (1)
4. Four fair coins are tossed in the air at once. We will ignore the relatively rare occasion which results in a coin landing and remaining on its edge. What is the probability of there being 2 tails and 2 heads in no particular order? (2)
5. Describe all possible expected phenotypic ratio(s) when corn parents are crossed and both are purple, the dominant phenotype. (1)
6. Describe the expected genotypic ratio when corn parents are crossed and both are yellow in color. (1)
7.Pigmentation is controlled by a dominant allele (C) and at least one such allele is needed to produce melanin, the absence of melanin is called albinism. Two heterozygous parents are mated and they have 4 children. Calculate the probability that all four children will be normal. (1)
8. A parent with genotype AaBb is mated with a parent having AaBB genotype. What is the probability that a single offspring will be A-B- or aaB-? (1)
Principles of Biology II Quiz #2 Makeup
Biological Science 107 Spring 2001
Dr. Ralph Harnishfeger
Name: ___________________________ Seat Number _____Score: _______
Please read each question carefully before answering. Do not leave a space blank if you know part of the answer, partial credit will be given, as appropriate. The point value of a correct answer to each question is given in (), ten (10) points total for this quiz. You may wish to show your calculations where appropriate.
1. Why did we use an ear of corn in our studies of Mendelian inheritance? (1)
2. Parents each have the genotype aa. Describe the kinds of gametes which can be produced and the probability of producing them. (2)
3. What is the probability rolling three dice simultaneously and have one dot come up on the top of all three? (1)
4. Four fair coins are tossed in the air at once. We will ignore the relatively rare occasion which results in a coin landing and remaining on its edge. What is the probability of there being 2 tails and 2 heads in no particular order? (2)
5. Describe all possible expected phenotypic ratio(s) when corn parents are crossed and both are purple, the dominant phenotype. (1)
6. Describe the expected genotypic ratio when corn parents are crossed and both are yellow in color. (1)
7.Pigmentation is controlled by a dominant allele (C) and at least one such allele is needed to produce melanin, the absence of melanin is called albinism. Two heterozygous parents are mated and they have 4 children. Calculate the probability that all four children will be normal. (1)
8. A parent with genotype AaBb is mated with a parent having AaBB genotype. What is the probability that a single offspring will be A-B- or aaB-? (1)
Principles of Biology II Quiz #3 Makeup
Biological Science 107 Spring 2001
Dr. Ralph Harnishfeger
Name: ___________________________ Seat Number _____Score: _______
Please read each question carefully before answering. Do not leave a space blank if you know part of the answer, partial credit will be given, as appropriate. The point value of a correct answer to each question is given in (), ten (10) points total for this quiz. You may wish to show your calculations where appropriate.
1. What is the expected genotypic ratio from a dihybrid test cross if one parent is homozygous dominant at both loci? (1)
2. Parents each have the genotype AaBb. Describe the kinds of gametes which can be produced and the probability of producing them. (2)
3. The chi square test for goodness of fit squares the deviations and then divides by the expected value for each class or phenotype observed. Why did the designers of the test include this division? (1)
The following formula and tabled values may be of some use to you.
4. When three children occur in a family there are various classes possible. All could be boys, all girls, 2 of one and one of the other. One hundred families with 3 children are sampled and the findings are reported below: Complete a chi square analysis (5% error rate accepted) and give your conclusions from this analysis below. (2) (Please show your work to earn partial credit.)
Class Observed Expected (0 – E) (O-E)2 (O – E)2/E
3 boys 15
3 girls 13
2 boys, 1 g 40
2 girls, 1 b 33
Sums 100 _____ _________
Calculated value of Chi Square statistic is: ___________
Conclusions drawn:
5. You hypothesize that offspring observed are the result of the mating of two diheterozygous parents. The observed phenotypic ratios are found to be 115 with red feathers and knobby beaks, 32 with red feathers and smooth beaks, 30 with white feathers and knobby beaks, and 25 with white feathers and smooth beaks.
Which are the dominant phenotypes?(1) ___________________________
Calculate the Chi Square statistic. Show work below:
Phenotype Obs. Expt. O-E (O-E)2 (O-E)2/E
Sum=_______ Sum= ____________
Calculated Chi Square Statistic is __________________ (2)
What does the value above tell you? __________________________(1)
Principles of Biology Quiz #8 – Hardy Weinberg - Populations
Biological Science 107 Section 02 Tuesday 8-10:50 AM
Dr. Ralph Harnishfeger Spring 2000
Name: ______________________________________________ Seat #:________ Score:____
The point value of each question is listed at the end of the question. Please take your time and read each question carefully before writing your answer. Partial answers will earn partial credit as appropriate, try not to leave a blank space.
The following formulae may be of some value to you on this quiz: p2+2pq+q2 = 1, p+q=1, (p+q)2=1
1. Define the term "gene pool" as we studied it last lab. (1 point)
2. What are four conditions necessary to maintain a population in Hardy Weinberg Equilibrium? (2 points)
3. We observe incomplete or partial dominance in flower color of some plants. Observation is made of parental plants, each with a single flower, and we count 36 white flowers, 48 red flowers and 22 pink flowers. Red dominates the while allele with pink flowers being heterozygotes. Please determine p and q in this plant population for the alleles for flower color. (2 points)
4. A random sample of 10,000 patrons of Wal Mart in Mill Hall, Pa shows that 9996 have 5 fingers and 4 show the dominant 6 finger condition. How many of the 4 people with 6 fingers would be expected to be heterozygotes? (2 points).
5. We upset equilibrium in several ways last lab and monitored the resulting changes in gene frequencies over several generations. Please describe any one of the upsets and explain, in general terms, what happened to p and q. You do not need to report specific values of p and q, only give the direction of change for each or make relative comparisons as necessary to explain yourself. (2 points)
6. What point about gene frequencies did the story about the monkeys on the log make? (1 point)
The following formulae may be of some value to you on this quiz: p2+2pq+q2 = 1, p+q=1, (p+q)2=1
1.. Define the term "genetic drift" as we studied it last lab. (1 point)
2. Describe any four conditions necessary to maintain a population in Hardy Weinberg Equilibrium? (2 points)
3. We observe incomplete or partial dominance in flower color of some plants. Observation is made of parental plants, each with a single flower. We cannot count red or pink flowers because an overabundant deer herd has eaten them all but do count 36 white flowers and see that 64 other flowers were eaten off at the stem. Red dominates the while allele with pink flowers being heterozygotes. Please determine p and q in this plant population for the alleles for flower color and predict how many red and pink flowers were eaten by the deer. (2 points)
4. A random sample of 10,000 patrons of Wal Mart in Mill Hall, Pa shows that 9980 have 5 fingers and 20 show the dominant 6 finger condition. How many of the 4 people with 6 fingers would be expected to be heterozygotes? (2 points).
5. We upset equilibrium in several ways last lab and monitored the resulting changes in gene frequencies over several generations. Please describe any one of the upsets and explain, in general terms, what happened to p and q. You do not need to report specific values of p and q, only give the direction of change for each or make relative comparisons as necessary to explain yourself. (2 poin
6. Describe what is meant by the Founder Effect? (1 point)
7. Bonus of 1 point. Population A has p of 0.1 and q of 0.9 while Population B has the reverse. Neither population has births due to food shortage. Migration is such that half of each population leaves each year and enters the other population. How many years must pass before p=q in both populations?