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- 1. Multiple Choice
In rabbits, black fur (B) is dominant to brown fur (b). Consider the following cross between two rabbits.
What is the phenotype of the offspring in box 3?
Brown
Black
A mixture of brown and black
None of the above
- 2. Multiple Choice
What is the genotypic ratio represented by the punnett square?
1:1
3:1
1:3
1:2:1
- 3. Multiple Choice
The allele for having a bent pinky finger is dominant to the allele for having a straight pinky finger. If two people who are both heterozygous for the trait of a bent pinky finger have a child, what is the percent probability that the child will have straight pinky fingers?
ABCD
0%
25%
75%
100%
- 4. Multiple Choice
What is the expected genotypic ratio resulting from a heterozygous x heterozygous monohybrid cross?
1:2:1
1:3:1
1:2
1:0
- 5. Multiple Choice
In a genetics laboratory, two heterozygous tall plants are crossed. If tall is dominant over short, what are the expected phenotypic results?
100% Tall
50% Tall, 50% Short
75% Tall, 25% Short
25% Tall, 75% Short
- 6. Multiple Choice
In chickens, feather color shows codominance. A black and white spotted chicken is considered to be "erminette."
(Goes with All erminette chicken questions)
What would be the resulting phenotype ratio of the offspring produced in a cross between two erminette chickens?
1:0
4:0
1:2:1
1:1
- 7. Multiple Choice
What are punnett squares used for?
Predicting the possible offspring of two parents
Determining the alleles of a specific gene
Identifying dominant and recessive traits
Determining an individuals genotype
- 8. Multiple Choice
What is the difference between a monohybrid and a dihybrid cross?
A monohybrid cross produces a single offspring, whereas a dihybrid cross produces two offspring
A monohybrid cross involves a single parent, whereas a dihybrid cross involves two parents
A monohybrid cross involves only one heterozygous parent whereas a dihybrid cross involves both heterozygous and homozygous parents
A monohybrid cross predits the outcome of one trait whereas a dihybrid cross predicts the outcome of two traits
- 9. Multiple Choice
In certain species of roses, white roses and red roses are incompletely dominant to each other. When a red rose and a white rose are crossed, a pink rose is produced. What is the probability of producing a white rose when a red rose is crossed with a pink rose?
100%
75%
25%
0%
- 10. Multiple Choice
In guinea pigs, the allele for rough coat (R) is dominant to the allele for smooth coat (r). A rough coat male and a smooth coat female mate. They produce several offspring - 50% are rough coat and 50% are smooth coat. What are the genotypes of the parents?
RR x rr
RR x Rr
Rr x rr
Rr x Rr
- 11. Multiple Choice
In cattle, roan coat color (mixed red and white hairs) occurs in the heterozygous (RW) offspring of red (RR) and white (WW) parents. Which of the following crosses would produce offspring in the ratio of 1 red:2 roan:1 white?
Red x White
Roan x Roan
White x Roan
Red x Roan
- 12. Multiple Choice
If a pea plant has one recessive allele for green peas, what conditions will allow for the green phenotype to appear?
Green peas will only appear if the dominant yellow allele is present
Green peas will always appear regardless of the other allele
Green peas will only appear if the dominant yellow allele is not present
Green peas will never appear regardless of the other allele
- 13. Multiple Choice
When roan cattle are mated, 25% of the offspring are red (RR), 50% are roan (RW), and 25% are white (WW). When the roan cattle are examined, it can be seen that the coat of the roan cow is made of both red and white hairs. What type of inheritance does this show?
Polygenic inheritance
Codominance
Incomplete dominance
Complete dominance
- 14. Multiple Choice
Gregor mendel crossed true-breeding purple flowered plants with true-breeding white flowered plants. All of the offspring were purple. What is the best explanation for this?
ABCD
The allele for purple flowered plants is recessive
The allele for white flowered plants is dominant
The allele for purple flowered plants is dominant
They were homozygous like their parents
- 15. Multiple Choice
Some traits are determined by more than two alleles. What are the possible gametes produced by an individual that is AaBb?
AB, Ab, aB, ab
BAa, Bb, AB, ab
AB, ab
AA, aa, BB, bb
- 16. Multiple Choice
What are different forms of a gene called?
Alleles
Chromosomes
Factors
Traits
- 17. Multiple ChoiceGenotype refers to the ...physical expression of the genesthe possible combination of alleles in a genewhether an allele is dominant or recessivehow an organism will appear
- 18. Multiple ChoiceAn offspring will receive how many alleles from each parent to determine a specific trait?onetwothreefive
- 19. Multiple ChoiceWhich of the following is a phenotype?BBBbbbBlue eyes
- 20. Multiple ChoiceWhat is a phenotypeThe genetic make up (code)The physical trait
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