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

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Grade 8 DNA, RNA, and Genetics
The science of heredity is called                  .
  1. genetics
  2. extinction
  3. evolution
  4. natural selection
Grade 8 DNA, RNA, and Genetics
Which of the following statements of homologous chromosomes is considered to be false?
  1. They are exactly identical.
  2. They can be found in pairs.
  3. They can have genes coding for the same traits.
  4. They can have genes that are encountered in the same order.
Grade 8 DNA, RNA, and Genetics
Passing traits from parents to offspring is called
  1. genetics
  2. heredity
  3. evolution
  4. gene
Grade 8 DNA, RNA, and Genetics
What is a Punnett square used to do?
  1. to show all the possible combinations of hair colors
  2. to show all possible shoe sizes
  3. to show DNA type
  4. to show all the possible combinations of alleles that can result from a genetic cross
Grade 8 DNA, RNA, and Genetics
What is a phenotype?
  1. an organism's genetic makeup or allele combination
  2. an organism's physical appearance or visible traits
Grade 8 DNA, RNA, and Genetics
Grade 8 DNA, RNA, and Genetics
In order to a female child to be born there must be
  1. an X and Y chromosome
  2. two X chromosomes
  3. two Y chromosomes
Grade 8 DNA, RNA, and Genetics
What are chromosomes?
  1. consists of DNA and protein molecules coiled into a definite shape.
  2. the process in which DNA is copied
Grade 8 DNA, RNA, and Genetics
Grade 8 DNA, RNA, and Genetics
Grade 8 DNA, RNA, and Genetics
Grade 8 DNA, RNA, and Genetics
Grade 8 DNA, RNA, and Genetics
Grade 8 DNA, RNA, and Genetics
Grade 8 DNA, RNA, and Genetics
Grade 8 DNA, RNA, and Genetics
Suppose each body cell of Animal A has 70 chromosomes, each sperm of Animal B has 36 chromosomes, and each egg of Animal C has 35 chromosomes. Which of the following is true?
  1. Animal A has the most chromosomes overall.
  2. Animal B and C are probably the same kind of animal.
  3. Animal A and C could be the same animal.
  4. Animal C has the most chromosomes in its body cells.
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