Biology 3rd Quarter Benchmark Exam Part 2

Test Description: This will help you prep for the exam.

Instructions: Answer all questions to get your test result.

1) For a population to be in genetic equilibrium,

2) According to Charles Darwin, organisms best suited to their environment reproduce more successfully than other organisms. This is known as the theory of

3) If an organism has a vestigial structure, what can a biologist infer about the organism’s evolutionary history?

4) According to Lamarck’s hypothesis of acquired traits, giraffes now have long necks because

5) A genetic cross performed many times produces 500 tall plants and 200 short plants. The probability of obtaining a tall plant in a similar cross is

6) To determine the genotype of an individual that shows the dominant phenotype, you would cross that individual with one that is

7) A farmer is using artificial selection to produce insect-resistant fruit by only cross- pollinating those plants that do not get eaten or attacked by insects. Which statement best describes what the farmer is using artificial selection to do?

8) A segment of DNA on a chromosome that controls a particular hereditary trait

9) What is the expected phenotypic ratio resulting from heterozygous X heterozygous dihybrid cross?

10) Monosomy and Trisomy are disorders caused by

11) An animal with the sex chromosomes XY, would most likely be a

12) Mutations that do not affect the organism itself, but may be passed on to the offspring are

13) A short section of DNA known to have an association with a particular gene located nearby

14) A point mutation that may go unnoticed because more than one codon may code for the same amino acid

15) In humans, traits controlled by 2 or more genes, such as skin color, eye color and height are

16) In order to detect genetic disorders, it may be necessary to perform a ______________, which is a picture of an individual's chromosomes.

17) All of the genes located on 1 chromosome can be shown by a

18) The exchange of pieces of DNA between homologous chromosomes

19) In a monohybrid cross between a homozygous dominant parent and a homozygous recessive parent, one would predict the offspring to be

20) Will you review how to analyze pedigrees before the exam?


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