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CH 8 &9
| Question | Answer |
|---|---|
| Which of these events occurs during anaphase? | Sister chromatids separate. |
| During telophase ______. | the events of prophase are reversed |
| Cytokinesis typically begins during the ______ stage of mitosis. | telophase |
| What is the difference between a benign and a malignant tumor? | Benign tumors do not metastasize; malignant tumors do. |
| What chromosomes belong to a normal human female? | 44 autosomes and 2 X chromosomes |
| A ______ describes a site of crossing over. | chiasma |
| Sister chromatids are joined at the ______. | centromere |
| How much genetic material is present in a cell during prophase I compared to a cell that has completed meiosis II? | . four times as much |
| Crossing over during prophase I results in ______. | genetic recombination |
| During metaphase ______. | chromosomes line up in the middle of the cell |
| A(n) ______ is an example of an organism that can sometimes reproduce asexually. | Komodo dragon |
| How many chromosomes does an individual with Turner syndrome have? | 2n - 1 |
| The correct sequence of stages of mitosis is ______. | prophase, metaphase, anaphase, telophase |
| In meiosis, how does prophase I differ from prophase II? | During prophase I there is one diploid cell; during prophase II there are two haploid cells. |
| How many chromosomes can a gamete possess as a result of nondisjunction? | n + 1 or n - 1 |
| Which of the following occurs during interphase? | Chromosome duplication. |
| Ordinary cell division produces two daughter cells that are genetically identical. This type of cell division is important for all of the following functions EXCEPT | production of sperm and eggs |
| What chromosomes belong to a normal human male | 44 autosomes, one X chromosome, and one Y chromosome |
| Chromosomes that do not determine the sex of an individual are called ______ | autosomes |
| A duplicated chromosome consists of two ______. | sister chromatids |
| What name is given to the specific location of a gene on a chromosome? | locus |
| An individual who is homozygous ______. | carries two copies of the same allele for a gene |
| An individual with curly hair and an individual withstraight hair mate; all of their offspring have wavy hair. If an individual with wavy hair mates with an individual with straight hair, what is the probability that their child will have curly hair? | 0% |
| What is the best explanation for a BbCc × bbcc cross producing offspring in a 5:5:1:1 phenotypic ratio? | linked genes |
| What is the key to the recognition of codominance? | The heterozygote expresses the phenotype of both homozygotes. |
| Attached earlobes are recessive to free earlobes. What genotypic ratio is expected when an individual with attached earlobes mates with an individual heterozygous for free earlobes? | 1:1 |
| Red-green color blindness is inherited as a sex-linked recessive trait. The gene is found on the X chromosome. How can a man with normal color vision father a daughter who is red-green color-blind? | He can't (unless there is a mutation) |
| Which of these crosses will only produce heterozygous offspring? | AA × aa |
| An individual with the blood group genotype LMLN has the phenotype MN. What is the relationship between the LM and LN alleles? | codominance |
| Marfan syndrome is the result of inheriting a single allele. Individuals with Marfan syndrome are tall and long-limbed, and have both cardiovascular and eye defects. The inheritance of Marfan syndrome is an example of _____ | pleiotropy |
| According to Mendel's law of segregation, ______. | gametes have one copy of each allele |
| An individual heterozygous for cystic fibrosis ______. | is a carrier |
| A purebred plant that produces yellow seeds is crossed with a purebred plant that produces green seeds. The seeds of all of the offspring are yellow. Why? | The yellow allele is dominant to the green allele. |
| A dihybrid cross produces 30 recombinant offspring out of a total of 1,000 offspring. What is the recombination frequency of the two gene pairs? | 3% |
| A mating between a purebred purple-flowered pea plant and a purebred white-flowered pea plant would produce a(n) ______. | Hybrid |
| Linked genes are usually | located close together on a chromosome. |
| Round seeds (R) are dominant to wrinkled seeds (r), and yellow seeds (Y) are dominant to green seeds (y). What is the expected phenotypic ratio of a cross between an RrYy and an rryy individual? | 1:1:1:1 |
| _____ genes violate Mendel's principle of independent assortment. | Linked |
| A purebred plant that produces yellow seeds is crossed with a purebred plant that produces green seeds. The F1 plants have yellow seeds. What is the expected phenotypic ratio of seed color of the offspring of an F1 × F1 cross? | 3:1 |
| The recombination frequency between gene B and gene C is 11%. The recombination frequency between gene B and gene D is 5%. The recombination frequency between gene C and gene D is 15%. What would be the arrangement of these genes on a linkage map? | DBC |
| Who is the best human in the whole wide world? | Addie Jo |
| Alleles are described as ______. | alternate versions of a gene |
| Hypophosphatemia (vitamin D-resistant rickets) is inherited as an sex-linked dominant trait. The relevant gene is found on the X chromosome. What is the expected outcome of a cross between a homozygous recessive woman and a man with hypophosphatemia? | All of their daughters and none of their sons exhibit hypophosphatemia. |
Created by:
Addiejo