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

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Grade 7 DNA, RNA, and Genetics
An organism with two identical alleles for a trait is
  1. a hybrid.
  2. homozygous.
  3. heterozygous.
Grade 7 DNA, RNA, and Genetics
Genetics is the study of how traits are
  1. separated.
  2. inherited.
  3. marked.
  4. created.
Grade 7 DNA, RNA, and Genetics
When a dominant allele is present, the genotype will be
  1. recessive.
  2. purebred.
  3. hybrid.
  4. dominant.
Grade 7 DNA, RNA, and Genetics
What are homologous chromosomes?
  1. chromosome pairs that come one from each parent
  2. chromosomes that are exact copies of each other
  3. chromosomes only found in humans
  4. all of the above
Grade 7 DNA, RNA, and Genetics
A genetically determined characteristic passed down from a parent to an organism is a
  1. heredity.
  2. gene.
  3. trait.
  4. pedigree.
Grade 7 DNA, RNA, and Genetics
What is an organism's genetic makeup or allele combinations?
  1. phenotype
  2. traits
  3. gene
  4. genotype
Grade 7 DNA, RNA, and Genetics
The transfer of genes from one organism to another is
  1. hybridization.
  2. cloning.
  3. selective breeding.
  4. genetic engineering.
Grade 7 DNA, RNA, and Genetics
The process that forms two DNA molecules from an original DNA molecule is
  1. replication.
  2. transcription.
  3. meiosis.
  4. DNA.
Grade 7 DNA, RNA, and Genetics
DNA is an acronym for
  1. deoxynitrogenous acid.
  2. decomponutrient acid.
  3. deoxyribonucleic acid.
  4. dinoribonucleic acid.
Grade 7 DNA, RNA, and Genetics
The genetic makeup of an organism is its
  1. hair color.
  2. genotype.
  3. facial shape.
  4. heredity.
Grade 7 DNA, RNA, and Genetics
How many chromosomes does a human sperm cell have?
  1. 22
  2. 23
  3. 26
  4. 46
Grade 7 DNA, RNA, and Genetics
A trait is determined by more than two alleles when                       occurs.
  1. DNA sequencing
  2. a single phenotype
  3. hereditary sequencing
  4. polygenic inheritance
Grade 7 DNA, RNA, and Genetics
Offspring that are the result of sexual reproduction are
  1. never identical to the parents.
  2. sometimes identical to the parents.
  3. always identical to the parents.
  4. always identical to other offspring.
Grade 7 DNA, RNA, and Genetics
The genetic makeup of an organism is its
  1. heredity.
  2. characteristics.
  3. genotype.
  4. hair color.
Grade 7 DNA, RNA, and Genetics
In class, you have to find a male karyotype. How will you know?
  1. There will be an X and Y on the paper.
  2. There will be two X's on the paper.
  3. There will be an X and V on the paper.
  4. There will be two Y's on the paper.
Grade 7 DNA, RNA, and Genetics
A recessive gene is a weak gene.
  1. True
  2. False
Grade 7 DNA, RNA, and Genetics
Phenotype is the
  1. physical characteristics.
  2. alleles that make up the gene.
  3. dominant genes.
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