Genetics and DNA: Practice!

What is Mendelian genetics?

• A type of genetic mutation

• The study of plant genetics

• The process of genetic recombination

• Principles of inheritance discovered by Gregor Mendel

Explain the difference between dominant and recessive traits in Mendelian genetics.

• Recessive traits are always expressed in offspring

• Dominant and recessive traits have no difference in expression

• Dominant traits are only expressed when two copies of the dominant allele are present

• Dominant traits are expressed when at least one copy of the dominant allele is present, while recessive traits are only expressed when two copies of the recessive allele are present.

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How are Punnett squares used to predict the outcome of genetic crosses?

• By consulting a horoscope to predict the outcome

• By flipping a coin to determine the outcome

• By using a crystal ball to predict the outcome

• By organizing the possible combinations of alleles from the parents.

What is a Punnett Square?

• A Punnett square is a type of crossword puzzle

• A Punnett square is a diagram that is used to predict an outcome of a particular cross or breeding experiment.

• A Punnett square is a type of cooking technique

• A Punnett square is a type of dance move

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What is genetic variation and why is it important for a species?

• Genetic variation is the diversity in genetic material within a population, and it is important for a species because it allows for adaptation to changing environments, increases the chances of survival, and provides the raw material for evolution.

• Genetic variation is the diversity in physical appearance within a population, and it is important for a species because it leads to uniformity

• Genetic variation is the result of a single gene in a population, and it is important for a species because it causes diseases

• Genetic variation is the same in all individuals within a population, and it is not important for a species

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What is the role of DNA and genes in inheritance and genetic traits?

• They determine the color of the eyes

• They control the growth of hair and nails

• They contain the genetic information that determines inherited traits.

• They are responsible for regulating body temperature

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In the Punnett square shown, what must the genotype of the missing parent be?

• BB
• Bb
• bb
• Tt

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B = brown fur  b = white fur
In the Punnett square, what is the probability for white fur? 

• 0%
• 25%
• 50%
• 75%

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If green is dominant over purple, then what is the genotype for this individual?

• Purple
• Green
• GG
• gg

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Which of the following terms refers to the different possibilities of a gene?

• chromosome
• DNA
• Punnett Squares
• allele