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Biology II Honors
Chapter 11 Review
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What are alleles?
The traits Mendel studies in garden peas showed
Computer simulations are sometimes used to demonstrate the outcome of monohybrid fruit fly
crosses, where a student can run generation after generation of fruit flies with 100 offspring
produced each generation, half male and half female, and a 3-to-1 phenotype ratio (or 75 to 25) in
the F1 generation. Compared with real genetics results,
The term based on the Greek root words for "different" and "balance" or "yoke" is
The F1 offspring of a monohybrid cross would show the genotype(s)
In a Mendelian monohybrid cross, which generation is always completely homozygous?
Since each child of two heterozygous parents has a 1/4 chance of receiving a recessive trait from
each parent,
What are traits that is the result of, or is affected by, the interaction of more than one gene?
When crossing a true-breeding red snapdragon glower with a true-breeding white flower of the
same species, we secure all pink offspring. This would seem to support the pre-Mendel view that
inheritance is a blending of parental traits. However, both Mendel and we know that "blending" of
parental traits is not correct and that particles of inheritance are actually involved because
10 A classical example of epistasis is
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Which of the following diseases is most prevalent in the Jewish community?
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Phenylketonuria is
If you had two guinea pigs of opposite sex, both homozygous, one black and one brown, but you
didn't know which was the dominant characteristic, how could you be certain that the guinea pigs
are truly homozygous?
In pea plants, the gene for round seed (R) is dominant, and wrinkled seeds (r) are recessive. The
endosperm of the pea is also either starchy, a dominant gene (S), or waxy (s). What can be said of a
fully heterozygous (or dihybrid) cross?
15 In which kind of cross would you expect to find a ratio of 3:1 among the F 2 offspring?
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Which disease results in deformed red blood cells, poor circulation, and anemia?
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What is true according to Mendel's law of segregation?
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If the parents are AO and BO genotypes for the ABO blood group, their children could include
which of the following genotypes?
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In which kind of cross would you expect to find two different kinds of ratios among the offspring,
either 1:1 or 1:1:1:1?
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The location on a chromosome where a particular gene is located is known as the:
21. Assume your parents have blood types A and B respectively, but you do not know if they are
homozygous or heterozygous. At the next family reunion, you get out a notepad and draw a pedigree
chart. Whose blood types would provide possible clues to your parents' genotypes?
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The F2 offspring of a monohybrid cross would show the genotype(s)
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Huntington disease is
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"Phenotype" is based on the Greek root words for
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In a pedigree chart, which is correct?
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"Genotype" is based on the Greek root words for
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A classical example of multiple alleles is
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Of the following which is not an autosomal dominant disorder?
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Which provides protection against malaria in the heterozygote?
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If a human who is a tongue roller (T) and has unattached ear lobes (E) marries a person who cannot
roll their tongue and has attached earlobes, could they produce an offspring that was also a nontongue roller with attached earlobes? What would be the genotype of the first parent? the second
parent?
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If individuals exhibiting a dominant phenotype are crossed and produce only offspring with the
dominant phenotype, what would be the logical genotype of the parents?
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The particulate theory of inheritance
Biology II Honors
Chapter 11 Review
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The offspring of a monohybrid testcross would show the genotype(s)
What causes the effects of albinism?
Which of the following crosses would always result in offspring that only display the dominant
phenotype?
Which type of inheritance results in continuous variation often a bell-shaped curve–because genes
at many loci are involved?
37. An individual with blood type A marries an individual with blood type B. What blood types could
their offspring exhibit?
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A classical example of incomplete dominance is
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Which of the following diseases is NOT inherited as an autosomal recessive?
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If an individual with a dominant phenotype is crossed with an individual with a recessive
phenotype, 4 of their 9 offspring show the recessive phenotype. What is the genotype of the first
parent?
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As many as 60 % of people in malaria-infected regions of Africa have the sickle-cell allele, but
only about 10% of the U.S. population of African ancestry carries the allele. Malaria remains a
major disease in central Africa but has not been a serious problem in the U.S. for many
generations. What is/are the reason(s) for the difference in the percentages and what is a reasonable
statement about future percentages?
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If a pea plant shows a recessive phenotype,
43. Explain the difference between multiple alleles and polygenic inheritance.
44. Explain what Mendel's law of segregation says and what it means.
45. Describe the cause and characteristics of cystic fibrosis and discuss the potential for repair of the
defect through genetic engineering.
46. Explain pleiotropy and give an example.
47. Explain the statement "chance has no memory." How does it apply to inheritance?
48. Describe X-linked characteristics?
49. In humans, X-linked diseases include
50. Women with X-linked disorders always pass the genes for the disorder to ______, while men with
X-linked disorders always pass the genes for the disorder to _______.