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

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Grade 7 DNA, RNA, and Genetics
In a pedigree, a square is used to represent a
  1. female.
  2. male.
  3. carrier.
  4. clone.
Grade 7 DNA, RNA, and Genetics
What is a trait?
  1. hormone that regulates hunger
  2. distinguishing feature or characteristic
  3. segment of DNA
Grade 7 DNA, RNA, and Genetics
The allele for hemophilia is on the X chromosome and is a
  1. hybrid gene.
  2. sex-linked gene.
  3. heterozygous gene.
  4. homozygous gene.
Grade 7 DNA, RNA, and Genetics
The process of manufacturing a single mRNA strand from a DNA molecule is
  1. transcription.
  2. replication.
  3. regeneration.
  4. meiosis.
Grade 7 DNA, RNA, and Genetics
Which is NOT a nitrogen base of DNA?
  1. adenine
  2. bromine
  3. cytosine
  4. guanine
Grade 7 DNA, RNA, and Genetics
What nucleotide base always pairs with adenine in DNA?
  1. cytosine
  2. thymine
  3. guanine
  4. uracil
Grade 7 DNA, RNA, and Genetics
DNA stands for deoxyribonucleic acid.
  1. True
  2. False
Grade 7 DNA, RNA, and Genetics
The genetic material in the chromosomes of each cell is
  1. RNA.
  2. DNA.
  3. BNA.
  4. CNA.
Grade 7 DNA, RNA, and Genetics
Alleles that are both expressed when both are inherited are                .
  1. recessive
  2. codominant
  3. dominant
  4. nondisjunction
Grade 7 DNA, RNA, and Genetics
                is made from a single chain of nucleotides.
  1. DNA
  2. Protein
  3. Fat
  4. RNA
Grade 7 DNA, RNA, and Genetics
The process of choosing organisms with specific desired traits to be parents is
  1. selective breeding.
  2. genetic engineering.
  3. inbreeding.
  4. hyrbridization.
Grade 7 DNA, RNA, and Genetics
A group of three DNA bases codes for one                .
  1. protein
  2. RNA code
  3. gene
  4. amino acid
Grade 7 DNA, RNA, and Genetics
Human blood type is an example of what genetic principle?
  1. multiple alleles
  2. co-dominance
  3. dominant and recessive alleles
  4. all of the above
Grade 7 DNA, RNA, and Genetics
A genetic disorder in which a person's blood clots very slowly, if at all, is
  1. sickle-cell disease.
  2. cystic fibrosis.
  3. Down syndrome.
  4. hemophilia.
Grade 7 DNA, RNA, and Genetics
Both alleles are expressed in an organism with                     .
  1. codominance
  2. incomplete dominance
  3. nondominance
  4. indominance
Grade 7 DNA, RNA, and Genetics
The different forms of a gene are
  1. phenotypes.
  2. genotypes.
  3. alleles.
Grade 7 DNA, RNA, and Genetics
An allele that is masked by another allele is
  1. polygenic.
  2. marked.
  3. recessive.
  4. passive.
Grade 7 DNA, RNA, and Genetics
An organism that has one dominant and one recessive allele for height is
  1. overt.
  2. medium in height.
  3. heterozygous.
  4. homozygous.
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