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Geneticsss
Genetic Test
| Question | Answer |
|---|---|
| What does a cell make during the synthesis stage of the cell cycle? | A copy of DNA |
| . The gap 1, gap 2, and synthesis stages of the cell cycle make up what? | Interphase |
| 3. During which stage shown in Figure 5.1 does cytokinesis take place? | Mitosis |
| 4. Is it true that left and right halves of the chromosome shown in Figure 5.2 carry identical genetic information? | Yes |
| 5. Multicellular organisms use mitosis for growth, development, and what? | Repair |
| 31) If a tumor is malignant, then cancer cells from the tumor will do what? | Form more tumors |
| 32) One difference between a cancer cell and a normal cell is what? | Cancer cells divide in the absence of growth factors |
| 33) Offspring that are genetically unique are the result of which process? | Meiosis |
| 34) In Mendel's monohybrid cross of a purebred white-flowered plant and a purebred purple-flowered plant, what was the genotype and phenotype of the F generation? | Genotype – Pp; Phenotype - purple |
| 35) Describe the function of meiosis. | To reduce chromosoe number by half, and produce gametes |
| 36) What human cell is haploid? | sperm and egg |
| 37) The fusion of haploid gametes is called | fertilization |
| 38) All of the genetic material that makes up an organism is called its what? | genome |
| 39) What term would you use to describe different forms of the same gene on homologous chromosomes? (homozygous, heterozygous) | heterozygous |
| 40) Mendel's law of segregation states what? | Organisms inherit two copies of each gene and that organisms donate copies to offspring in predictable ratios. |
| Which pair of genes in Figure 6.2 would be most likely to have a genetic linkage? | C and D |
| 42) What was a key factor in the success of Mendel's experiments? | He started with self-pollinating purebread plants |
| 43) In a genotype for plant height, such as Tt, what does each letter represent? | One allele |
| 44) When is a recessive allele expressed in offspring? | Only when two copies are present |
| 45) What human cell type could have 22 autosomes and a Y chromosome? | Sex cells; sperm & egg |
| 46) If someone is heterozygous for a recessive allele that causes a disorder, what phenotype will be expressed? | Will not have the disorder but can be a carrier |
| The Punnett square in Figure 7.1 shows a cross between two parents who are heterozygous for an autosomal genetic disorder caused by a recessive allele. People with which genotype will have the disorder? | “ss” offspring |
| 48) One parent is homozygous for a recessive allele and one parent is heterozygous for a recessive allele in an autosomal dominant genetic disorder. What is the chance that a child of those two parents will have the disorder? | 50% |
| 49) A female is born with attached earlobes, which is a recessive phenotype. What are the possible genotypes of her parents? | parents have recessive alleles |
| 50) Suppose a person is homozygous recessive for a recessive genetic disorder. This genotype means that the person will express what phenotype? | He has the genetic disorder |
| 51) If more males than females in a family have a recessive sex-linked disorder, what can you infer about patterns of inheritance in that family? | Only females would be carriers of the disorder |
| The gene linkage map shown in Figure 7.2 shows the order of genes A, B, and C. Which of the genes would most likely be inherited together? | C and A |
| 53) Why do sex-linked disorders appear more often in males? | Because they are not masked by another X, because males have an X and a Y |
| 54) Down syndrome is characterized by having an extra copy of at least a portion of chromosome 21. What method of genetic study would quickly identify the disorder? | karyotypes |
| 55) What is the process below? Name the four stages and describe each stage | Mitosis; Prophase (chromosomes condense, spindle fibers form), Metaphase (chromatids line up at the equator), Anaphase (sister chromatids separate and move to either pole), Telophase (two new nuclei are formed) |
| 30) What process is shown in diagram 2 of Figure 6.3? How do you know? | Meiosis; because there are 2 cell divisions |
| Write the genotype and phenotype of the parental generation pea plants shown in figure 7.3 | RR – red; rr - white |
| What method of studying genetic inheritance is shown in Figure 7.4? | pedigree chart |
| ) What do the shaded circles represent? | females with the particular phenotypes |
Created by:
morbidloner66
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