Use the following information to answer the next question. A student observed a specimen from the root of a common plant. He used five different fields of view. He observed that there wer

Use the following information to answer the next question.
A student observed a specimen from the root of a common plant. He used five different fields of view. He observed that there were 74 cells in interphase, 19 cells in prophase, 16 cells in metaphase, 12 cells in anaphase, and 15 cells in telophase. He also observed that the total time of the cell cycle was 36 hours
Assume that the fraction of cells found in each stage of the cycle is proportional to the
amount of time the cell spends in this stage. What fraction of time is spent in metaphase?
Record your answer in the space provided.
Nondisjunction is the failure of homologous chromosomes or sister chromatids to separate properly during cell division. What would be the effect on the number of chromosomes in
sailetes que to non-disiunction?
a) Some gametes will have all the chromosomes, while others will not have any
chromosomes
b) The gametes will have either too few or too many chromosomes
c) The chromosome number of the gameste remains in the same as the parent somatic
d) Gametes will have he the number of chromosomes of the parent cell
One can conclude from trabove graph that in a predator-prey relationship cycle
a) a decrease in the predator population does not affect the prey population
b) a decrease in the prey population does not affect the predator population
c) an increase in the predator population is followed by an increase in the prey population
d) there is always more prey than predators
Match the events that occur during Meiosis I to the stages in which they occur.
Anaphase I
telophase
Prophase I
Metaphase I
1. condensation of chromatin into
chromosomes
2. homologous pairs of chromosomes
align on the equatorial plane
3. microtubules begin to shorten, pulling one chromosome of each homologous pair to opposite poles
4. chromosomes of each homologous pair arrive at opposing poles of the cell

Multiple alleles exist in a population when there are many variations of a gene present. In organisms with two copies of every gene, also known as diploid organisms, each organism has the ability to express two alleles at the same time. In humans a single gene with multiple alleles determines a person’s blood type. If an individual with blood type A mates with a person who has blood type B. what blood type can their offspring have.
a) A B and AB
b) AB and O
c) AB
d) B A AB and O
Which of the following reasons account for the probable occurrence of the bottleneck
errect in a population:
a) slow mutation rate
b) extreme reduction in population
c) genetically variable individuals
d) small population size
What is the event during replication where individual chromosomes contain some genes of original material and some genes of paternal origin in humans?
a) non-disjunction
b) linkage
c) crossing over
d) mutation
In a specific plant, we know, yellow colour (r) is recessive to red colour (R) and short plants (t are recessive to tall plants T. Homozygous tall plants that produced red fruits were crossed with homozygous short plants that produced yellow fruit. What type of genotypes
will be produced in F1 generation?
a) RETt, RRIt, ErTT
b) RRTT, rrtt
c)TtRr
d) RRtt, rrTT
i and ii cause an increase in the size of a population. The statement given above is completed by the information in row__
a) emigration immigration
b) morality natality
c) immigration natality
d) morality immigration
In which behaviour of chromosomes do mitosis and meiosis differ from each other?
a) In meiosis, homologous chromosomes lie in pairs but don’t cross over: whereas, in
mitosis, chromosomes remain separate and undergo crossing over.
b) In meiosis, homologous chromosomes lie in pairs, and crossing over takes place;
whereas. In mitosis, homologous chromosomes there are no variations or crossing over.
c) In mitosis, chromosomes, as a whole, move towards the opposite poles; whereas, in meiosis I, chromatids move towards the opposite poles.
d) In meiosis, homologous chromosomes don’t lie in pairs and don’t undergo crossing oer; whereas, in mitosis, chromosomes lie in pairs and get crossed over.
The population whose age pyramid is shown above does not have a
a) large number of childre
b) low birth rate
c) high birth rate
d) high death rate

Use the following information to answer the next question.
In a study of canary’s. ornithologists determine that there were 60 birds living in a 60m^2 garden.
Which of the following variables of ecology can be calculated from the given information?
a) grown rate of the population
b) per capita growth rate of the population
c) density of the populations
d) biotic potential of the population

Taking a DNA sample from a mother and a child, what would be the expected percent of matching fragments in the two samples?

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