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1. 
Gene A (yellow) is dominant over gene a (green).The crossing of AA and aa will give:
A.
50 % yellows and 50 % greens
B.
100 % of yellow
C.
25 % yellow, 50 % greenish yellow and 25 % greens
D.
100 % Greens
2. 
Gene A (yellow) is dominant over gene a (green). The crossing of 2 heterozygous Aa will give:
A.
50 % yellows and 50 % greens
B.
25 % Yellow, 50 % Greenish yellow and 25 % greens
C.
75 % Yellows and 25 % Greens
D.
100 % Greens
3. 
Partial dominance for antennae in insects: A Long, AB Medium, and B Short. Crossing of AA x BB
A.
100 % Long
B.
50 % Long and 50 % Short
C.
25 % Long, 50 % Medium, 25 % Short
D.
100 % Medium
4. 
Partial dominance for antennae in insects :A Long, AB Medium, and B Short. Crossing of AB x AB
A.
25 % Long, 50 % Medium, 25 % Short
B.
50 % Long and 50 % Short
C.
100 % Medium
D.
100 % Long
5. 
The color of the carnation flowers shows a partial or incomplete dominance. The R allele codes for red, the B allele for white and the heterozygote RB turns pink. At the crossing of two RB heterozygotes one might expect the color of their offspring to be:
A.
50 % Red, 50 % White
B.
25 % red, 50 % pink and 25 % white
C.
100 % Pink
D.
33 % Red, 33 % White and 33 % Pink
6. 
The color of the carnation flowers shows a partial or incomplete dominance. The R allele codes for red, the B allele for white and the heterozygote RB turns pink. At the intersection of two homozygous BBs and a heterozygous BR, how would you expect the color of the offspring to be?
A.
25 % White, 50 % Pink and 25 % Red
B.
50 % White and 50 % Red
C.
50 % White and 50 % Pink
D.
33 % White, 33 % Red and 33 % Pink
7. 
Some specimens of the Bobtail breed do not have a tail. Two dogs without a tail are crossed and the resulting offspring are: 75% puppies without a tail and 25% puppies with a tail. It can be concluded that the allele coding for "NO TAIL" is:
A.
Imposible to know
B.
Recessive
C.
Codominant
D.
Dominant
8. 
Daltonism (which is a condition that does not allow to distinguish some colors) is due to a recessive gene linked to the X chromosome. This recessive gene for color blindness is represented by dX and the chromosome of an un-impaired vision by X. What would be the possible phenotype of children resulting from the marriage between a carrier woman and a visually un-impaired man?
A.
25 % carrier woman, 25 % daltonic woman, 25% normal man and 25 % carrier man.
B.
50 % carrier woman y 50 % normal man
C.
25 % normal woman, 25% carrier woman, 25 % normal man and 25 % daltonic man
D.
50 % normal woman and 50 % daltonic man
9. 
Daltonism (which is a condition that does not allow to distinguish some colors) is due to a recessive gene linked to the X chromosome. This recessive gene for color blindness is represented by dX and the chromosome of an un-impaired vision by X. What would be the possible phenotype of children resulting from the marriage between a carrier woman and a Daltonic man?
A.
25 % carrier woman, 25 % daltonic woman y 50 % daltonic man
B.
25 % normal woman, 25 % carrier woman, 25 % normal man and 25 % daltonic man
C.
25 % carrier woman, 25 % daltonic woman, 25 % normal man and 25 % daltonic man
D.
50 % daltonic woman and 50 % daltonic man
10. 
DNA segment that contains the information for a specific trait.
A.
Genotype
B.
Genome
C.
Chromosome
D.
Gen
11. 
It is the name given to the variant forms of a gene
A.
Alleles
B.
Genes
C.
Chromosomes
D.
Genotypes
12. 
This cell contains the total chromosomes of a species. It is represented as 2n.
A.
Gamete
B.
Haploid
C.
Diploid
D.
Complete
13. 
This cell contains only half of a species' chromosomes. It is represented as n
A.
Incomplete
B.
somatic cell
C.
Diploid
D.
Haploid
14. 
When an organism has two identical alleles for the same gene, it is said to be:
A.
Gay
B.
Zygote
C.
Homozygous
D.
Heterozygous
15. 
Which one of these represents a heterozygous genotype?
A.
B.
C.
D.