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- 1. Multiple Choice
For a particular trait, R is dominant to r. Look closely at the Punnett square below. What is the probability of an offspring having the genotype that results in the appearance of the recessive trait?
100%
75%
50%
25%
- 2. Multiple Choice
The Punnett squares below show two different crosses, A and B. Which statement is true about both of these Punnett squares?
The phenotype that results from the dominant allele cannot appear in either cross
The phenotype resulting from the dominant allele can appear in Cross B, but not Cross A
The phenotype that results from two recessive alleles can appear in Cross A, but not in Cross B
The phenotype that results from two recessive alleles can appear in Cross B, but not in Cross A
- 3. Multiple Choice
For pea plants, T represents a dominant allele for tall pea plants and t is the recessive allele for short pea plants. If two plants with the Tt genotype are crossed, what is the probability that offspring will exhibit the dominant trait?
100%
75%
50%
25%
- 4. Multiple Choice
A purebred plant that has a genotype of GG is crossed with a purebred plant that has the genotype gg. What are all the possible genotypes of the offspring?
GG, gg, and Gg
only Gg
only GG
GG and gg
- 5. Multiple Choice
For a particular trait, the allele F is dominant over the allele f. The Punnett square below shows the genetic cross of two parents, each with the genotype Ff.
Which box in this Punnett square would contain two dominant alleles?
1
2
3
4
- 6. Multiple Choice
The table below describes two types of cell division. Which correctly identifies the type of cell division in Rows 1 and 2?
Row 1: meiosis, Row 2: mitosis
Row 1: mitosis, Row 2: mitosis
Row 1: meiosis, Row 2: meiosis
Row 1: mitosis, Row 2: meiosis
- 7. Multiple Choice
Jeannie was studying heredity and drew the illustration shown below. What is Jeannie showing with the dark lines inside each cell?
nucleus
organelles
chromosomes
cell membrane
- 8. Multiple Choice
The hairline pattern called a widow’s peak is an inherited trait that is easily visible in humans. For people who express this trait, their hairline forms a V shape above their forehead. People who do not express the trait for a widow’s peak have a straight hairline above their forehead. Which statement BEST explains how traits such as a widow’s peak are inherited?
Offspring can express traits from genes they inherited from both parents
Offspring can only express traits from genes they inherited from just one parent
Offspring can express traits from genes they inherited from a source other than the parents
Offspring can only express traits from genes they inherited from the parent that is the same gender
- 9. Multiple Choice
Every organism requires a set of instructions that specifies its traits. This information is carried with the cells of the organism. Which set of statements BEST describes hereditary information in eukaryotic cells?
Genes are made up of chromosomes and both are found in the cell’s cytoplasm.
Chromosomes are made up of genes and both are found in the cell’s cytoplasm.
Genes are made up of chromosomes and both are found in the cell’s nucleus.
Chromosomes are made up of genes and both are found in the cell’s nucleus.
- 10. Multiple Choice
A mother and father have two daughters. The daughters have some similar and some different physical features. Which statement BEST explains why the girls’ physical appearance includes both similar and different features?
one daughter received fewer genes than the other
each daughter received a different number of genes from each parent
the daughters received a random set of genes from both parents
one daughter received all her genes from her father and the other daughter received all her genes from her mother
- 11. Multiple Choice
In the process of reproduction, hereditary information is passed from one generation to the next. Some organisms reproduce asexually. How does an offspring produced by asexual reproduction (mitosis) compare to the parent organism?
its genetic information is completely different from the parent organism
one-quarter of its genetic information is the same as the parent organism
one-half of its genetic information is the same as the parent organism
all of its genetic information is the same as the parent organism
- 12. Multiple Choice
There are two kinds of reproduction, asexual (mitosis) and sexual (meiosis). Which of the statements correctly states a difference between the two types of reproduction?
Sexual reproduction involves transfer of genetic information, but asexual does not.
Asexual reproduction involves meiosis, but sexual reproduction does not.
Sexual reproduction requires two parent organisms, while asexual reproduction requires only one.
Asexual reproduction produces new organism, while sexual reproduction does not.
- 13. Multiple Choice
Which statement is true about DNA?
DNA is an exact copy from parent to offspring
DNA is not necessary for an organism to reproduce
DNA contains genes that determine specific traits for an organism
Organisms create their own DNA sequence that is not like their parents
- 14. Multiple Choice
Reproduction in bacteria requires one parent. What form of reproduction is this?
sexual reproduction involving mitosis
sexual reproduction involving meiosis
asexual reproduction involving mitosis (or binary fission)
asexual reproduction involving meiosis
- 15. Multiple Choice
Every organism requires a set of instructions that specifies its traits. Which statement best describes the hereditary information in a cell?
Each chromosome contains a single gene
A gene, but not a chromosome, is made of DNA
A gene, but not DNA, is passed on to the next generation
Genes are located on the chromosomes
- 16. Multiple Choice
The genetic code is determined by:
the sequence of phosphates in DNA
the sequence of sugars in DNA
the sequence of nitrogen bases in DNA
the sequence of acids in DNA
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