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In high school science, students will look at genetic variation and its control. This quiz looks at the differences that can be found between organisms of the same species in particular. This is partly genetic variation, such as eye color, but also environmental variation, caused by things such as diet.
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There are not only differences between different species of plants and animals but also between individual organisms of the same species. These differences are due partly to the information they have inherited from their parents and partly to the different environments in which the individuals live and grow.
The information that results in plants and animals having similar characteristics to their parents is carried by genes, which are passed on in the sex cells (gametes) from which the offspring develop. Different genes control the development of different characteristics of an organism. Many genes are needed to carry all the genetic information for a whole organism.
Genes make up the chromosomes of an organism and are contained in the nucleus of each cell. In the gametes, the nucleus contains only half of the number of chromosomes required for the complete organism. When the male and female gametes come together, their nucleii fuse and the fertilized cell (zygote) contains a full set of chromosomes and can develop into and adult animal or mature plant.
Since half of the information for the new individual comes from the male gamete and half from the female, there are many similarities to, but some differences from, the parents. This difference between organisms of the same species is called variation.
Sometimes this variation creates a feature in a plant or animal that enables it to compete better. If that is the case, the organism will breed successfully and the new feature is likely to be passed on to the next generation. This is how evolution takes place.
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1.
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Genes are part of what? |
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[ ] |
Mitochondria |
[ ] |
Cytoplasm |
[ ] |
Chlorophyll |
[ ] |
Chromosomes |
|
|
2.
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What causes inherited variation? |
|
[ ] |
The new individual gets half of its genes from each parent |
[ ] |
The new individual gets all of its genes from one parent only |
[ ] |
The new individual has completely different genes to either of its parents |
[ ] |
During fertilization, all of the genes change shape |
|
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3.
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Gametes contain only half the number of chromosomes other types of cells have, therefore they are what? |
|
[ ] |
Haploid |
[ ] |
Diploid |
[ ] |
Ovoid |
[ ] |
Blastoid |
|
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4.
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Environmental variation can be caused by which of the following? |
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[ ] |
Climate |
[ ] |
Light intensity |
[ ] |
Diet |
[ ] |
All three of the above |
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5.
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Which of the following could account for body mass? |
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[ ] |
Genetic reasons only |
[ ] |
Environmental reasons only |
[ ] |
Genetic and environmental reasons |
[ ] |
None of the above |
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6.
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Eye color can be changed using colored contact lenses. Eye color is an example of what? |
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[ ] |
Genetic variation only |
[ ] |
Environmental variation only |
[ ] |
Genetic and environmental variation |
[ ] |
None of the above |
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7.
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Eye color is an example of which of the following? |
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[ ] |
Continual variation |
[ ] |
Continuing variation |
[ ] |
Discontinued variation |
[ ] |
Discontinuous variation |
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8.
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Which of the following is correct in order of decreasing size? |
|
[ ] |
Cell, nucleus,chromosome, gene |
[ ] |
Gene, chromosome, nucleus, cell |
[ ] |
Nucleus, cell, gene, chromosome |
[ ] |
Cell, chromosome, gene, nucleus |
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9.
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A group of students carried out a survey into the blood groups. What would be the most appropriate way to show the data? |
|
[ ] |
A pie chart |
[ ] |
A line graph |
[ ] |
An infographic |
[ ] |
A histogram (bar chart) |
|
|
10.
|
Why is plotting a line graph of foot length more appropriate than using a bar chart? |
|
[ ] |
Foot length is an example of continuous variation |
[ ] |
Feet are different shapes |
[ ] |
Foot length is an example of discontinuous variation |
[ ] |
Shoe size depends on foot length |
|
|
1.
|
Genes are part of what? |
|
[ ] |
Mitochondria |
[ ] |
Cytoplasm |
[ ] |
Chlorophyll |
[x] |
Chromosomes |
|
|
2.
|
What causes inherited variation? |
|
[x] |
The new individual gets half of its genes from each parent |
[ ] |
The new individual gets all of its genes from one parent only |
[ ] |
The new individual has completely different genes to either of its parents |
[ ] |
During fertilization, all of the genes change shape |
|
|
3.
|
Gametes contain only half the number of chromosomes other types of cells have, therefore they are what? |
|
[x] |
Haploid |
[ ] |
Diploid |
[ ] |
Ovoid |
[ ] |
Blastoid |
|
|
4.
|
Environmental variation can be caused by which of the following? |
|
[ ] |
Climate |
[ ] |
Light intensity |
[ ] |
Diet |
[x] |
All three of the above |
|
|
5.
|
Which of the following could account for body mass? |
|
[ ] |
Genetic reasons only |
[ ] |
Environmental reasons only |
[x] |
Genetic and environmental reasons |
[ ] |
None of the above |
|
|
6.
|
Eye color can be changed using colored contact lenses. Eye color is an example of what? |
|
[x] |
Genetic variation only |
[ ] |
Environmental variation only |
[ ] |
Genetic and environmental variation |
[ ] |
None of the above |
|
|
7.
|
Eye color is an example of which of the following? |
|
[ ] |
Continual variation |
[ ] |
Continuing variation |
[ ] |
Discontinued variation |
[x] |
Discontinuous variation |
|
|
8.
|
Which of the following is correct in order of decreasing size? |
|
[x] |
Cell, nucleus,chromosome, gene |
[ ] |
Gene, chromosome, nucleus, cell |
[ ] |
Nucleus, cell, gene, chromosome |
[ ] |
Cell, chromosome, gene, nucleus |
|
|
9.
|
A group of students carried out a survey into the blood groups. What would be the most appropriate way to show the data? |
|
[ ] |
A pie chart |
[ ] |
A line graph |
[ ] |
An infographic |
[x] |
A histogram (bar chart) |
|
|
10.
|
Why is plotting a line graph of foot length more appropriate than using a bar chart? |
|
[x] |
Foot length is an example of continuous variation |
[ ] |
Feet are different shapes |
[ ] |
Foot length is an example of discontinuous variation |
[ ] |
Shoe size depends on foot length |
|
|