Joan and her doctor notice a suspicious lump in her breast. Joan also has a family history of breast cancer. Which of the following is not a likely next step as they work to determine the cause of the lump?
A. performing a diagnostic mammogram
B. genetic testing for mutations in the BRCA1 gene
C. taking a biopsy of the lump to look for the presence of cancer cells
D. performing a mastectomy to remove all breast tissue in that breast
Answer: D
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a. carries the SRY gene b. is present in two copies in males c. pairs with an autosome during meiosis d. carries many genes that are not involved in sex determination e. is not present in males
If two individuals both heterozygous for the
same genes (e.g., AaBb) mate and have offspring, how many different phenotypes will there be?
a. 1 b. 2 c. 3 d. 4 e. 5
Branches of a bronchus are known as ____
a. larynx b. bronchi c. bronchioles d. trachea e. pharynx
The species richness of insects on trees can be predicted by which of the following?
A. The area hypothesis B. The evapotranspiration rate C. The average body size of insects D. The species-time hypothesis