How was Curt Stern able to establish a connection from certain specific phenotypes to the X chromosome, without the use of DNA sequencing and other modern molecular tools?
a. Stern selectively bred his Drosphilia test population to have larger, easier to study X chromosomes.
b. The traits were only expressed in male Drosphilia, indicating they were carried on the X chromosome.
c. The traits he studied correlated to structural differences in the X chromosome that were visible through a microscope.
d. Stern injected his test subjects with radioactive dyes that fluoresced in the presence of chromosome abnormalities.
c. The traits he studied correlated to structural differences in the X chromosome that were visible through a microscope.
You might also like to view...
What digestive hormone stimulates gall bladder contraction?
A. insulin B. gastrin C. secretin D. gastric inhibitory peptide E. cholecystokinin
Which of the following groupings of organs is responsible for the maintenance of water balance in the body?
A) liver, kidneys, hypothalamus B) heart, liver, posterior pituitary C) posterior pituitary, hypothalamus, kidneys D) kidneys, hypothalamus, liver E) posterior pituitary, bone marrow, kidneys
Answer the following questions true (T) or false (F)
1. Streak plates are a useful way to obtain CFUs. 2. Agar is a useful compound in the microbiology lab because it is an excellent nutrient for bacteria. 3. Enrichment culturing may require use of controlled environmental conditions.
Which part of the body is often diseased in alcoholics due to exposure to alcohol?
A. liver B. esophagus C. stomach D. kidneys E. large intestine