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Genetics Pre Test
March 2, 2021
Welcome to your Genetics Pre Test
A group of students made the observations listed below about the size, shape, and appearance of their hands. Which of the students’ observations describe inherited traits?
A. Observations 2 and 5 only
B Observations 1, 3, and 4 only
C Observations 2, 3, and 5 only
D All the observations
The hydra is a very small, simple animal that lives in water. Hydras reproduce asexually by budding, a process in which a bud breaks off an adult hydra and floats away. Which of the following best describes a hydra bud?
A. A hydra bud contains genetic material from its two parents.
B. A hydra bud is genetically identical to the parent hydra.
C. A hydra bud has different mutations than the parent hydra.
D. A hydra bud has half as much genetic material as the parent hydra.
A tiger cub has a pattern of stripes on its fur that is similar to that of its parents. Where are the instructions stored that provide information for a tiger’s fur pattern?
A. In cytoplasm inside cells
B. On genes within chromosomes
C. On the cell membrane
D. In the mitochondria
Sexual reproduction in animals depends on the production of gametes (egg and sperm cells). Which of these processes produces gametes in animals?
D. Binary fission
Scientists can bioengineer skin in a laboratory to treat severe burns and other types of skin injuries. This bioengineered tissue is grown from living cells. The cellular process that enables the cells to produce more identical cells that can develop into tissue is _____
In cocker spaniels the allele for a black coat color (B) is dominant over the allele for a brown coat color (b). If a brown cocker spaniel (bb) is crossed with a heterozygous black cocker spaniel (Bb), which of the following genotypic ratios can be expected?
A. 0 BB: 2 Bb: 2 bb
B. 1 BB: 2 Bb: 1 bb
C. 2 BB: 0 Bb: 2 bb
D. 2 BB: 1 Bb: 0 bb
In cattle the allele for cloven hooves (H) is dominant over the allele for mule-foot hooves (h). The phenotype for each trait is shown in this picture. What is the probability of cloven hooves in the offspring of parents that are heterozygous (Hh) for the trait?
Some dairy farmers want to increase the amount of milk produced by their cows. How can the farmers use selective breeding to increase milk production?
A. By increasing the age of the cows that are bred
B. By choosing cows that are high milk producer
C. By limiting the number of offspring per cow
D. By choosing cows that can produce milk after eating the most food
During the final stages of human gestation, receptors for the hormone oxytocin increase on the smooth muscle cells of the uterus. The release of oxytocin during labor stimulates the smooth muscle tissue in the wall of the uterus. The strong contraction of the smooth muscle in the uterus helps push the baby through the birth canal so that delivery can occur. Mutations can have ______
A. No effect
B. A beneficial effect
C. A harmful effect
D. All of the above
An organism's phenotype is influenced by ____
A. only genetics
B. only the environment
C. genetics and environment
D. only mutations in the genetic code
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