Genetics Quiz Review

1. Which is true of mutations in DNA?

• A. All mutations are beneficial to an organism.
• B. A mutation might have no effect on an organism.
• C. All mutations are harmful to an organism.
• D. Mutations have no effect on an organism.

Tags

NGSS.HS-LS3-2

2. Characteristics that are passed from parents to offspring such as eye color are called ___.

• A. adaptations
• B. mutations
• C. acquired traits
• D. inherited traits

3. Which term refers to physical characteristics that are studied in genetics?

• A. traits
• B. offspring
• C. generations
• D. hybrids

Tags

NGSS.MS-LS4-4

4. Segments of DNA that code for traits are called ___.

• A. genes
• B. chromosomes
• C. factors
• D. Tally Sheet

5. The different forms or variations of a gene are called ____.

• A. genes
• B. traits
• C. alleles
• D. factors

6. Scientists call an organism that has two different alleles for a trait a ___.

• A. purebred
• B. hybrid
• C. factor
• D. trait

Tags

NGSS.MS-LS4-4

7. What does the notation BB mean to geneticists?

• A. two dominant alleles
• B. two recessive alleles
• C. at least one dominant allele
• D. one dominant and one recessive allele

8. An organism that has two identical alleles for a trait is ___.

• A. codominant
• B. tall
• C. homozygous
• D. heterozygous

9. What does the notation Tt mean to geneticists?

• A. two dominant alleles
• B. two recessive alleles
• C. at least one dominant allele
• D. one dominant and one recessive allele

10. A heterozygous organism has

• A. three different alleles for a trait.
• B. two identical alleles for a trait.
• C. only one allele for a trait.
• D. two different alleles for a trait.