An organism is homozygous dominant for one trait and heterozygous for another. a scientist uses this organism in a dihybrid cross. how many different allele combinations can the organism produce for these traits in his or her gametes?
two
sixteen
four
one
an organism is homozygous dominant for one trait and heterozygous for another. what is the probability of the organism producing a gamete with one dominant allele and one recessive allele for these traits?
4 out of 4
1 out of 2
1 out of 4
2 out of 16
!

What does gradualism and punctuated equilibrium have in common

Which of the following statements is correct in hour our immune system responds to a potential pathogen? a. the adapted immune system will call on the innate immune system to destroy the pathogen. b. b cells will start reading the antigen code immediately and call t cells to assist in destroying the pathogen. c. the skin will be the first line of defense, and then the many phagocytes in the bloodstream will attempt to consume the possible pathogen. d. the t-cells in the adapted immune systems are the first to recognize the pathogen vaccines are weakened forms of disease causing microorganisms, which are given to patients to prevent disease. after the vaccine is administered, the immune system responds by creating a(n) to recognize the a. antigen, antibody b. antibody, antigen c. antibody, antibiotic d. antibiotic, antibody

What is a food chain? a.different animals located in different communities b. energy transferred from the sun to plants and then to a series of living things c. rows of crops, such as lettuce, in a field d.animals using one another as food for energy and growth