FREE AND STUDY GAMES ABOUT BIO 148 EXAM 3

PDF Download

FREE AND STUDY GAMES ABOUT BIO 148 EXAM 3

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -140 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: Similar gill pouches in embryos of a chick, human, and cat are an example of

_____.

Answer:

developmental homology Question 2: The movement of alleles between populations; occurs when individuals leave one population, join ?

Answer:

Gene Flow Question 3: When crossing an organism that is homozygous recessive for a single trait with a heterozygote, what is the chance of producing an offspring with the homozygous recessive phenotype?

Answer:

50%

Question 4: a trait produced by the interaction and additive effects of numerous genes (each of which ?contribute a small amount to phenotype)

Answer:

Quantitative Traits Question 5: A pattern of natural selection that favors extreme phenotypes at both ends of the range ?of phenotypic variation.

Answer:

Disruptive Selection Question 6: ?A similarity in embryonic form, or in the fate of embryonic tissues, that is due to inheritance from a common ancestor

Answer:

Developmental homology

Question 7: When can nondisjunction occur?

Answer:

All three answers are correct.Question 8: Can create new species if the hybrids between related, sympatric species are ?fertile and have adaptive traits.

Answer:

Hybridization Question 9: ?The process by which individuals with certain heritable traits tend to produce more ?surviving offspring than do individuals without those traits, often leading to a change in the genetic makeup of ?the population.

Answer:

Natural Selection Question 10: Similarities in DNA sequences or amino acid sequences that are due to inheritance from a common ancestor.

Answer:

Genetic homology

Question 11: Which assumption must be correct for a population in Hardy-Weinberg equilibrium for a specific gene?

Answer:

No genetic drift can affect allele frequencies for the gene Question 12: The fossil record resembles the living species in the same geographic area. How does this pattern support the theory of evolution by natural selection?

Answer:

It is evidence that species can change over time.Question 13: In a bell-shaped curve, the x-axis (horizontal direction) of the graph represents which of the following?

Answer:

The value of a particular characteristic; characteristics of an organism can include such traits as size and color.Question 14: Distinguishes between genotype and phenotype. This hypothesis proposed that discrete units of heredity (genes) are inherited by offspring and remain unchanged in the offspring. Those genes are passed on by the progeny and subsequent generations unchanged.

Answer:

Particular inheritance Question 15: A pattern of natural selection that favors extreme phenotypes at both ends ?of the range of phenotypic variation.

Answer:

Disruptive Selection Question 16: The number of distinct (different) chromosome sets in a cell. Symbolized as n.

Answer:

Haploid number Question 17: What is the difference between heterozygous and homozygous individuals?

Answer:

All of the gametes from a homozygote carry the same version of the gene while those of a heterozygote will differ.

Question 18: True or false? The same phenotype can be produced by more than one genotype.

Answer:

True Question 19: What genotype frequencies are expected under Hardy-Weinberg equilibrium for a population with allele frequencies of p = 0.8 and q = 0.2 for a particular gene?

Answer:

The expected genotype frequencies are 0.64, 0.32, and 0.04 for A1A1, A1A2, and A2A2, respectively.

Question 20: autopolyploids or allopolyploids form, creating new species that

?cannot interbreed with the original diploid population(s).

Answer:

Sympatric Speciation by polyploidization

Question 21: Which of the following is the best modern definition of evolution?

Answer:

descent with modification Question 22: Two mice are heterozygous for albinism (Aa) . The dominant allele (A) codes for normal pigmentation, and the recessive allele (a) codes for no pigmentation. What percentage of their offspring would have an albino phenotype?

Answer:

25 Question 23: The state of having an abnormal number of copies of a certain chromosome.

Answer:

Aneuploidy

Question 24: Why are human and chimpanzee DNA 96 percent similar?

Answer:

The two species descended from a recent common ancestor.Question 25: When constructing a Punnett square, the symbols on the outside of the boxes represent _______, while those inside the boxes represent _______.

Answer:

gametes, progeny