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