Según la segunda ley de Mendel, en la segunda generación filial se produce la segregación de los caracteres, lo que significa que durante la formación de los gametos, los alelos de un par se separan para determinar la constitución genética, De forma que los alelos de los padres se combinan en el descendiente para garantizar la variabilidad genética. Según esta norma, al cruzar individuos de la primera generación (Aa, por ejemplo) o al autofecundarse uno de ellos, se obtiene una proporción fenotípica igual en la descendencia.

MODULE 23 Assessment Vocabulary Review Correct the sentences below by replacing the italicized term with the correct vocabulary term. 1. A(n) infection is an organism that causes disease. 2. A substance that kills cells or interferes with their functions is called a(n) vector. 3. When pathogens in the body multiply and damage body cells, a(n) virus results. Understanding Key Concepts After reading the question or statement, select the correct answer. 4. The common cold and influenza are caused by a. overeating. b. viruses. c. bacterial infection. d. exposure to toxins. 5. Malaria, West Nile virus, and Lyme disease are

The most effective regulator of blood pH is which of the following? the renal system the respiratory system the digestive system the buffer system

Which of the following happen when dehydration begins to occur? the body reduces fluid output to zero polyuria is present. the body increases the release of atrial natriuretic hormone the salivary secretions decrease

8. Wolves are at the top of the wolves all but disappeared from Yellowstone. Which of the following was a likely effect of the wolves' disappearance?

The most effective regulator of blood pH is which of the following? the renal system the respiratory system the digestive system the buffer system