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Seventh Grade (Grade 7) DNA, RNA, and Genetics Questions

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Grade 7 DNA, RNA, and Genetics
Amino acids are transported to mRNA by
  1. DNA.
  2. protein synthesis.
  3. tRNA.
  4. meiosis.
Grade 7 DNA, RNA, and Genetics
How many chromosomes do most human cells have?
  1. 12
  2. 23
  3. 46
  4. 68
Grade 7 DNA, RNA, and Genetics
Which genotype is purebred?
  1. AA
  2. Aa
  3. XY
Grade 7 DNA, RNA, and Genetics
During DNA replication, adenine pairs only with
  1. thymine.
  2. cytosine.
  3. guanine.
  4. lactic acid.
Grade 7 DNA, RNA, and Genetics
A(n)                 is one of a number of different forms of a gene.
  1. allele
  2. pedigree
  3. trait
  4. gamete
Grade 7 DNA, RNA, and Genetics
The genes of one organism are transferred into the DNA of another organism during                    .
  1. hybridization
  2. genetic engineering
  3. selective breeding
  4. inbreeding
Grade 7 DNA, RNA, and Genetics
What is an example of a heterozygous genotype?
  1. AA
  2. Ab
  3. Aa
  4. aa
Grade 7 DNA, RNA, and Genetics
Sexual reproduction results in
  1. more diverse offspring.
  2. more uniform offspring.
  3. both a and b
  4. none of the above
Grade 7 DNA, RNA, and Genetics
A physical or chemical agent that can cause a mutation in DNA is a(n)
  1. protein.
  2. mutagen.
  3. antigen.
  4. chromatid.
Grade 7 DNA, RNA, and Genetics
A unit that contains a sugar, a phosphate, and a base is a
  1. RNA molecule.
  2. codon.
  3. nucleotide.
  4. mRNA strand.
Grade 7 DNA, RNA, and Genetics
A chart that tracks which members of a family have a particular trait is called a
  1. pedigree.
  2. Punnett square.
  3. karyotype.
  4. genome.
Grade 7 DNA, RNA, and Genetics
What is the passing of traits from parents to offspring called?
  1. heredity
  2. allele
  3. genotype
  4. phenotype
  5. genetics
  6. gene
  7. homozygous
  8. heterozygous
Grade 7 DNA, RNA, and Genetics
What is a sequence of three nucleotides in a DNA molecule?
  1. codon
  2. strand
  3. DNA
  4. nucleotide
Grade 7 DNA, RNA, and Genetics
The offspring of asexual reproduction is identical to the parent except in the case of                       .
  1. cloning
  2. genetic mutation
  3. fertilization
  4. multicellular organism
Grade 7 DNA, RNA, and Genetics
What does DNA do?
  1. makes food
  2. determines traits
  3. converts food to energy
  4. stores substances
Grade 7 DNA, RNA, and Genetics
What nucleotide base always pairs with cytosine?
  1. adenine
  2. thymine
  3. guanine
  4. uracil
Grade 7 DNA, RNA, and Genetics
In DNA, a base bonds with only one other base because bases are
  1. replicated.
  2. fragmentary.
  3. duplicated.
  4. complementary.
Grade 7 DNA, RNA, and Genetics
A plant that receives different genetic information from each parent is a(n)
  1. allele.
  2. phenotype.
  3. hybrid.
  4. sex-linked gene.
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