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Eighth Grade (Grade 8) DNA, RNA, and Genetics Questions

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Grade 8 DNA, RNA, and Genetics
What type of organism did Gregor Mendel experiment on?
  1. pea plants
  2. radish plants
  3. fruit flies
  4. planaria
Grade 8 DNA, RNA, and Genetics
Transferring a portion of DNA between organisms is
  1. selective breeding.
  2. natural selection.
  3. internal fertilization.
  4. genetic engineering.
Grade 8 DNA, RNA, and Genetics
The passing of traits from parents to offspring is
  1. probability.
  2. heredity.
  3. recessive.
  4. meiosis.
Grade 8 DNA, RNA, and Genetics
Who developed a chart to make genetic predictions?
  1. Reginald Punnett
  2. Charles Darwin
  3. Alfred Wegener
  4. Gregor Mendel
Grade 8 DNA, RNA, and Genetics
Which statement describes the term "heterozygous"?
  1. The alleles are the same.
  2. The alleles are different.
  3. There is no allele.
  4. There are two pairs of alleles.
Grade 8 DNA, RNA, and Genetics
A pea plant with two tall genes is
  1. homozygous tall.
  2. heterozygous tall.
  3. homozygous short.
  4. heterozygous short.
Grade 8 DNA, RNA, and Genetics
What accounts for pink flowers being produced from a cross between a plant with red flowers and a plant with white flowers?
  1. multiple alleles
  2. inbreeding
  3. incomplete dominance
  4. polygenic inheritance
Grade 8 DNA, RNA, and Genetics
If an organism is produced by sexual reproduction, which of these statements is true of its chromosomes?
  1. It receives all of its chromosomes from its female parent.
  2. It receives half of its chromosomes from each of its parents.
  3. It receives most of its chromosomes from its female parent.
  4. It receives all of its chromosomes from either its male or its female parent.
Grade 8 DNA, RNA, and Genetics
The DNA of a eukaryotic cell is mostly located in the
  1. proton.
  2. electron.
  3. nucleus.
  4. chloroplast.
Grade 8 DNA, RNA, and Genetics
Which effect could not be directly caused by mutations in human DNA?
  1. cancer
  2. an injury
  3. a genetic disorder
  4. an inherited disorder
Grade 8 DNA, RNA, and Genetics
The majority of sex-linked genes can be found on the                    .
  1. X chromosome
  2. dominant chromosome
  3. Y chromosome
  4. autosomes
Grade 8 DNA, RNA, and Genetics
Each human trait is determined by at least one pair of genes. What is one type of gene?
  1. provisional
  2. dominant
  3. excessive
  4. inclusive
Grade 8 DNA, RNA, and Genetics
Which of these pairs identifies the two steps directly involved in making a protein?
  1. mutation and replication
  2. replication and translation
  3. transcription and replication
  4. transcription and translation
Grade 8 DNA, RNA, and Genetics
Which statement is NOT true about a recessive gene trait?
  1. It is expressed when the genotype is heterozygous.
  2. It can be masked by a dominant gene trait.
  3. It is expressed only when a dominant gene is not present.
  4. It can be expressed when the genotype is homozygous.
Grade 8 DNA, RNA, and Genetics
When a red horse is crossed with a white horse, the offspring are roan (red and white). What explains this type of inheritance?
  1. multiple alleles
  2. codominance
  3. polygenic inheritance
  4. incomplete dominance
Grade 8 DNA, RNA, and Genetics
An organism receives chromosomes from
  1. the environment.
  2. the atmosphere.
  3. its parents.
  4. mutations.
Grade 8 DNA, RNA, and Genetics
Which structures are arranged in pairs and are found in most human cells?
  1. chromosomes
  2. oxygen molecules
  3. human genomes
  4. gametes
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