Name: ___________________________________________________________________ Bio IBS Y2
Topic 4 Quiz
Vocabulary:
1. Gene:
a. A heritable factor that controls a specific characteristic.
/23 pts
[2]
2. Allele:
[3]
a. One specific form of a gene, differing from other alleles by one or a few
bases only and occupying the same gene locus as other alleles of the gene.
3. Genome:
a. The whole of the genetic information of an organism.
[1]
4. Gene Mutation:
a. A random, rare change in genetic material.
[1]
5. Homologous Chromosomes:
[2]
a. A pair of chromosomes of similar size and shape that carry the same
genes.
6. Genotype:
a. The alleles of an organism.
[1]
7. Phenotype:
a. The characteristics of an organism.
[1]
8. Dominant allele:
[1]
a. An allele that has the same effect on the phenotype whether it is present
in the homozygous or heterozygous state.
Name: ___________________________________________________________________ Bio IBS Y2
9. Recessive allele:
[1]
a. An allele that only has an effect on the pheotype when present in the
homozygous state.
10. Codominant alleles:
a. Pairs of alleles that both affect the phenotype when present in a
heterozygoute.
[1]
11. Locus:
a. The particular position on homologous chromosomes of a gene.
[1]
12. Homozygous:
a. Having two identical alleles of a gene
[1]
13. Heterozygous:
a. Having two different alleles of a gene.
[1]
14. Carrier:
[2]
a. An individual that has one copy of a recessive allele that causes a genetic
disease in individuals that are homozygous for this allele.
15. Test cross:
a. Testing a suspected heterozygote by crossing it with a known
homozygous recessive.
[2]
16. Sex linkage:
[1]
a. Any genetic trait whose allele has its locus on a sex chromosome (X or Y).
17. Clone:
[1]
a. A group of genetically identical organisms, or a group of cells derived
from a single parent cell.
Name: ___________________________________________________________________ Bio IBS Y2
Topic 4 Quiz
Vocabulary:
/23 pts
1. Gene:
[2]
2. Allele:
[3]
3. Genome:
[1]
4. Gene mutation:
[1]
5. Homologous chromosomes:
[2]
6. Genotype:
[1]
7. Phenotype:
[1]
8. Dominant allele:
[1]
Name: ___________________________________________________________________ Bio IBS Y2
1. Recessive allele:
[1]
9. Codominant alleles:
[1]
10. Locus:
[1]
11. Homozygous:
[1]
12. Heterozygous:
[1]
2. Carrier:
[2]
3. Test cross:
[2]
4. Sex-linkage:
[1]
5. Clone:
[1]