In the last line of the passage, the author writes, "they think that a gigantic meteorite hit earth over 65 million years ago." this statement is intended to
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a. introduce a new idea
b. contradict an earlier statement
c. give an example
d. provide an explanation

Use the above pedigree for questions 1,2, and 3 1. what kind of genetic disorder is represented in the pedigree? a. recessive b. dominate refer to the pedigree in question 1. 2. is the mutated gene in this disorder located on a sex chromosome (x or y) or an autosome? a. sex chromosome b. autosome refer to the pedigree in question 1. 3. which generation has individuals that you are certain are heterozygous for the mutated gene? a. generation 1 b. generation 2 c. generation 3