1/9: Which of the following is an example of a biological trait?
- Hair style
- Eye color
- Regional accent
1/10: What resulted when Mendel crossed a purple flowered plant with a white flowered plant?
- Some offspring had purple flowers and some had white flowers.
- All the offspring had white flowers.
- All the offspring had purple flowers.
- All the offspring had pink flowers.
1/12: An Aa individual
- Has a homozygous genotype
- Has a heterozygous phenotype
- Has a heterozygous genotype
- Has a homozygous phenotype
1/22: Which is Mendel’s law of independent assortment?
- Allele pairs separate independently during meiosis.
- Allele pairs separate independently during mitosis.
- Different allele pairs are inherited together.
- Different alleles of the same gene are found on the same locus.
1/23: What is the probability that the offspring of a cross between a homozygous recessive parent and a heterozygous parent will be homozygous recessive?
1/24: The term for a cross that involves just one trait, such as pod shape, is called a
- Homozygous cross
- Test cross
- Monohybrid cross
- Dihybrid cross
1/25: The fur of cattle can be red, white, or roan (white and red together). Which of the following is true about the type of inheritance associated with this trait?
- This is incomplete dominance.
- This is codominance.
- Mutations have occurred in the individual cattle.
- Red is dominant over white.
1/26: A ___________ traces the inheritance of a particular trait through generations.
- Chromosome map
1/29: 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
- Will develop the disorder only late in life
- Cannot pass the disorder to sons, just daughters
- The allele is not passed on due to Y chromosomes inactivation
1/30: Identical twins who are raised apart can have differences that last a lifetime. This is evidence that
- Phenotype differences happen through multiple alleles
- Genotype can change over time
- Environment and genotype interact to affect phenotype
- Codominance affects genotype
2/1: Which of the following types of genetic information can be identified easily with a karyotype?
- Homologous chromosomes
- Dominant traits
- Exact locations of genes
- Recessive alleles
2/2: Can a male be a carrier for hemophilia?
- No he cannot be a carrier because he has only one X chromosome.
- No he cannot be a carrier because he has only one Y chromosome.
- Yes he can be a carrier because he has both an X and Y chromosome.
- Yes he can be a carrier because he has two X chromosomes.
2/6: What term describes a feature that allows an organism to better survive in its environment?
2/7: Which scientist developed a classification system based on similarities?
- Georges Buffon
- Eramus Darwin
- Jean-Baptiste Lamarck
- Carolus Linneaus
2/8: How do artificial selection and natural selection differ?
- In artificial selection, the environment acts as the selecting agent.
- In natural selection, traits that are useful to humans are inherited.
- In natural selection, humans act as the selecting agent.
- In natural selection, the environment acts as the selecting agent.
2/9: Protein molecules are composed of long chains of _______.
- Amino acids
2/12: What can be learned about evolution from DNA sequencing?
- DNA sequencing reveals what structures are homologous.
- Similar DNA sequences in two organisms indicate that one organism evolved from the other.
- Two DNA sequences that are very different indicate that many mutations have occurred.
- The more similar the DNA sequences of two organisms are, the more closely related they are.
2/13: What did the variations in the Galapagos finches seem to be well-suited to?
- The animals’ size
- The animals’ age
- The island the animals lived on
- The animals’ environment and diet
2/14: Which is the best definition of a species?
- A group of organisms that can breed and produce fertile offspring together
- A group of organisms that can breed and produce infertile offspring together
- A group of organisms that can breed
- A group of organisms that look and act similar
2/16: Which of the following describes a population?
- Dogs and cats living in Austin, Texas
- Four species of fish living in a pond
- Dogwood trees in Middletown, Connecticut
- Roses and tulips in a garden
2/21: The bottleneck effect occurs when a very large proportion of a population is killed off suddenly. The population faces the risk of becoming extinct. Why is this?
- With only a few individuals remaining, there is great genetic variation.
- With a large population remaining, there is great genetic variation.
- With only a few individuals remaining, there is little genetic variation.
- With a large population remaining, there is little genetic variation.
2/23: DNA is a double-stranded nucleic acid formed by millions of linked nucleotides that each contain the sugar deoxyribose, a phosphate group, and one of four nitrogenous bases. How does the structure of DNA allow it to store hereditary information?
- The unique order of the nitrogenous bases codes for specific traits in an organism.
- Each nucleotide in a strand of DNA codes for one specific trait in an organism.
- The sugar deoxyribose codes for all of the specific traits of an organism.
- Each strand of DNA codes for one specific trait in an organism.