A group of students conducted an investigation that produced the results shown in the table. Students washed their hands and then touched nutrient agar dishes with their fingers. Some students acted as controls by not washing their hands.
In ferrets the brown coat colour is dominant over the white colour. A heterozygous brown female was crossed with a heterozygous brown male. What would be the probability of an offspring being homozygous?
Which description below correctly identifies the characteristics of the genetic material found in some types of infective agents?
What do B cells produce when they bind to an antigen and undergo cell division?
The photomicrograph below shows a cross section through a vascular bundle. The area of the photomicrograph is:
The emphasis of health programmes has changed over time, from being predominantly concerned with treating diseases, to prioritizing the prevention of the spread or incidence of diseases
The following equipment is set up in a laboratory for a first-hand investigation: data logger, pH probe, beaker of distilled water and a drinking straw. What could the student be investigating with this equipment?
Which of the following statements best describes Mendel’s work on inheritance?
What is the function of cytotoxic T-lymphocytes?
What was the role of Sutton and Boveri in genetics?