2. Mendel's Laws of Inheritance

Probability and Genetics

Multiple Choice
In a population of cats, the allele for long tails (L) is dominant over the allele for short tails (l). If the frequency of the dominant allele (L) is 0.7, what is the expected frequency of cats with long tails in the population, assuming Hardy-Weinberg equilibrium?
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Multiple Choice
With four distinct nucleotides, how many different combinations are possible in a sequence of six nucleotides?
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Multiple Choice
In a family where both parents are heterozygous carriers for cystic fibrosis (genotype Ff), what is the probability that their daughter Irene is a carrier (heterozygous) for the disease? Express your answer as a percentage.
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Multiple Choice
In a pedigree where both parents are heterozygous (Ww) for a gene with complete dominance, what is the probability that their child, individual III-1, is homozygous recessive (ww)?
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Multiple Choice
In a population of butterflies, the allele frequency of A is 0.7 and the allele frequency of a is 0.3. According to Hardy-Weinberg equilibrium, what is the expected frequency of the heterozygous genotype (Aa) in this population?
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Multiple Choice
Charles has normal blood clotting, while Marie is a carrier for hemophilia (an X-linked recessive disorder). What is the probability that their female child will suffer from hemophilia?
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Multiple Choice
If one parent is heterozygous (Aa) and the other is homozygous recessive (aa) for a dominant gene associated with Alzheimer's disease, what is the probability that their child will inherit the dominant gene?
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Textbook Question
If two six-sided dice are rolled, what is the probability that the total number of spots showing is

an odd number?
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Multiple Choice
In a population of cats, the allele for long tails (L) is dominant over the allele for short tails (l). If the frequency of the long tail allele (L) is 0.7 and the population is in Hardy-Weinberg equilibrium, what is the expected frequency of cats with long tails?
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Multiple Choice
In a family where both parents are heterozygous carriers for cystic fibrosis (genotype Cc), what is the probability that their daughter Irene is a carrier (heterozygous) for the disease? Express your answer as a percentage.
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Textbook Question
A woman expressing a dominant phenotype is heterozygous (Dd) for the gene.

Draw a pedigree that illustrates the transmission of the dominant trait from the grandmother to two of her grandchildren who are first cousins.
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Multiple Choice
Use the product law to calculate the probability that mating two organisms with the genotype of AaBbCcDd will produce offspring with the genotype of AA bb Cc Dd?
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Multiple Choice
In a family of five children what is the probability that… All are females
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Multiple Choice
In a family of five children what is the probability that… Two are males and three are females
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Multiple Choice
In a family of six children, where both parents are heterozygous for albinism, what is the probability that four are normal and two are albinos?
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