POST UTME UNIOSUN 2021 Biology | Objective
Practice these randomly selected questions to test your readiness.
Question 1
In a human population, the frequency of the allele 'A' is 0.7 and the frequency of the allele 'a' is 0.3. What is the expected genotype frequency of the genotype 'AA'?
Question 2
A plant with the genotype 'Rr' is crossed with a plant with the genotype 'RR'. What is the probability that the offspring will have the genotype 'Rr'?
Question 3
A diagram shows a plant with a root system that has a taproot and a fibrous root system. What is the name of the plant?
Question 4
In a certain e\cosystem, the population of rabbits (R) and foxes (F) is governed by the following differential equations:\\( \frac{dR}{dt} = 0.5R - 0.02RF \\ \\ \frac{dF}{dt} = 0.01RF - 0.3F \\ \\ \\ \text{If} \\ R(0) = 100 \\ \\ \text{and} \\ F(0) = 20, \\ \\ \text{find} \\ R(10) \\ \\ \text{and} \\ F(10).
Question 5
In a random sample of 1000 people, 60% are male and 40% are female. If 20 people are randomly selected, what is the probability that at least 10 of them are male?
Question 6
In a population of 1000 individuals, 70% are homozygous dominant (BB), 20% are heterozygous (Bb), and 10% are homozygous recessive (bb). What is the frequency of the recessive allele (b) in this population?
Question 7
Which of the following hormones plays a crucial role in regulating growth and development in the body?
Question 8
A diagram of a plant cell is shown below. Identify the part labeled A.
Question 9
A diagram shows a graph of the growth of a population over time. What is the name of the growth model?
Question 10
A 2.5-liter solution of 0.5 M NaCl is diluted to 1 liter. What is the concentration of the resulting solution?
Question 11
In a population of 1000 individuals, 200 are heterozygous for a particular gene, while 300 are homozygous recessive. What is the frequency of the dominant allele?
Question 12
Which of the following types of tissue is characterized by its ability to contract and relax, allowing for movement?
Question 13
In a population of Drosophila melanogaster, the frequency of the recessive allele 'a' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the genotype 'AA'?
Question 14
A plant with the genotype 'Rr' is crossed with a plant with the genotype 'rr'. What is the probability that the offspring will have the genotype 'Rr'?
Question 15
A species of bird has a wing span of 1.5 meters. If the bird is flying at a speed of 50 km/h, what is the power output of the bird's wings?
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