Imagine That You Compare Two DNA Sequences Found in the Same

question 25

Multiple Choice

Imagine that you compare two DNA sequences found in the same location on homologous chromosomes.On one of the homologs,the sequence is AACTACGA.On the other homolog,the sequence is AACTTCGA.Within a population,you discover that each of these sequences is common.These sequences _____.

• A)contain an SNP that may be useful for genetic mapping
• B)identify a protein-coding region of a gene
• C)cause disease
• D)protect against disease
• E)none of the above

---

Definitions:

Reaction Range

The potential variability in the expression of a trait due to environmental influences, given genetic constraints.

Obesity

Excess body fat accumulation that presents a risk to health, defined by a Body Mass Index (BMI) of 30 or higher.

Monozygotic Twins

Twins that result from one fertilized egg splitting and developing into two embryos, genetically identical.

Dizygotic Twins

Twins conceived by the union of two different ova (or a single ovum that has split) with two different sperm cells; also called fraternal twins; they are no more alike genetically than any other siblings.