chapter 7
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| Two parents have the genotype Gg for a genetic disorder caused by a dominant allele. What is the chance that any of their children will inherit the disorder? | 75%
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| The gene linkage map shown in Figure 7.2 shows the order of genes A. B. and C. Which of the following statements about the genes is true? | The distance between A and B is 14.5 map units
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| Thomas Morgan's research with fruit flies determined that | traits sometimes are inherited as a group
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| Two genes cross over 6% of the time. This percentage means that the genes are | not inherited together in 6 out of 100 offspring
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| A female is born with attached earlobes which is a recessive phenotype. Which of the following genotypes could her parents have? | Rr and rr
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| Suppose a person is a carrier for a genetic disorder. Which of the following phrases about this person is true? | does not have the disorder but can pass it on
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| Some members of a family have a recessive sex-linked disorder. Which of the following statements about the family would be true? | only females would be carriers
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| The passing of traits from parents to offspring is called | heredity
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| The "father" of genetics was | Gregor Mendel
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| If an individual possesses two recessive alleles for the same trait, the individual is said to be | homozygous for the trait
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| What is the expected phenotypic ratio resulting from a homozygous dominant x heterozygous monohybrid cross? | 1:0
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| A diagram in which several generations of a family and the occurrence of certain genetic characteristics are shown is called a | pedigree
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| In humans, eye color and height are controlled by | polygenic inheritance
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| Which of the following traits is controlled by multiple alleles in humans? | blood type
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| A trait that is determined by a gene that is only found on the X chromosome is said to be | sex linked
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| A person who is heterozygous for a recessive genetic disorder is called a(n) | carrier
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| Identifying patterns of inheritance within a family over several generations is possible by studying a diagram called a(n) | pedigree
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| Inheritance in which two dominant alleles are expressed at the same time is called | codominance
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| A person who has a disorder caused by a recessive allele is | homozygous with a recessive allele
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| Gene expression is influenced in many factors ~ | environment
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| *PUNNENT SQUARE* which of the following has the disorder? | homozygous recessive
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| For an XX female to express a recessive sex-linked trait, she must have | 2 recessive alleles
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| Human height occurs in a continuous range because it is effected by several genes making it | polygenic
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| Suppose a mouse with black fur & no coloration | the mouse is all white
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| What is the main reason that sex linked disorders are most often observed in males? | the Y can not mask alleles on the X
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| Which of the following tools is used to match up chromosome using chemical stains? | karyotype
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| Probability is calculated by dividing of 1 possible outcome | the total number of possible outcomes
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| A phenomenon in which a heterozygous individual- intermediate | incomplete dominance
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| A change is an organisms _______ can cause a change in an organisms gene | environment
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| A character for which there are 3 or more alleles is called | multiple alleles
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