Genetics Review 1

What is genetics?

• Genetics is the study of weather patterns
• Genetics is the study of rocks and minerals
• Genetics is the study of genes, genetic variation, and heredity in living organisms.
• Genetics is the study of ancient civilizations

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How is heredity and genetics related?

• Heredity is the process of DNA replication and genetics is the study of inherited traits
• Heredity is the study of genes and genetics is the passing of traits from parents to offspring
• Heredity and genetics are related as heredity involves the passing of traits from parents to offspring, while genetics is the study of genes and heredity.
• Heredity and genetics are completely unrelated concepts

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What is an allele?

• An allele is a type of protein found in the cell nucleus.
• An allele is a type of virus that infects plant cells.
• An allele is a type of organelle responsible for energy production in cells.
• An allele is a variant form of a gene.

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What do we use to represent an allele?

• We use letters to represent an allele.
• We use colors to represent an allele.
• We use symbols to represent an allele.
• We use numbers to represent an allele.

How many allele do you have per trait and why do they come from?

• You have two alleles per trait, one from each parent.
• You have one allele per trait, inherited from your mother only.
• You have four alleles per trait, inherited from both parents and grandparents.
• You have three alleles per trait, one from each parent.

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How many allele combination do we have?

• We have 5 possible allele combinations
• We have 2 possible allele combinations
• We have 3 possible allele combinations: homozygous dominant, heterozygous, and homozygous recessive.
• We have 4 possible allele combinations

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Do we use uppcase or lower case letter to represent a dominant allele? What about a recessive allele?

• We use numbers to represent a dominant allele and symbols to represent a recessive allele.
• We use lowercase letters to represent a dominant allele and uppercase letters to represent a recessive allele.
• We use special characters to represent a dominant allele and punctuation marks to represent a recessive allele.
• We use uppercase letters to represent a dominant allele and lowercase letters to represent a recessive allele.

What makes a dominant allele different from a recessive allele?

• A dominant allele is always masked by a recessive allele
• A recessive allele is always expressed in the presence of a dominant allele
• A dominant allele is only expressed when two copies are present
• A dominant allele is expressed when present with a recessive allele, while a recessive allele is only expressed when two copies are present.

What is a genotype and how is it different from phenotype?

• A genotype is the physical characteristics of an organism, while a phenotype is the genetic makeup.
• A genotype and phenotype are the same thing.
• A genotype is only present in plants, while a phenotype is only present in animals.
• A genotype refers to the genetic makeup of an organism, while a phenotype refers to the physical characteristics or traits.

Which of the following is an example of a genotype?

• AA, Aa, or aa

• Brown eyes

• Tall

• Hairless