What do you know about sex determination in animals? Pick the correct statement from the list below.
A: In all animals, females normally have two XX chromosomes.
B: In all animals, males have two different sex chromosomes; i.e., are heterogametic.
C: Dioecious organisms, the two sexes are different individuals that differ in their chromosomal make-up.
D: In both fruit flies and mammals, individuals with a Y chromosome always develop as males.
Answer: C: Dioecious organisms, the two sexes are different individuals that differ in their chromosomal make-up.
You might also like to view...
We know that that there are over 50 major phyla in Bacteria; however, only about 25 of these phyla have cultured representatives. Why is this?
How are scientists attempting to culture representative from the 25 phyla that do not currently have any organisms in culture? What will be an ideal response?
Which one of the following is not found at the site of protein synthesis?
A) DNA B) mRNA C) rRNA D) tRNA
T cells attack
A. transplanted tissue cells from one host to another. B. cancer cells. C. host cells that have been parasitized by microorganisms. D. All of the choices are correct.
Selenite broth serves which purpose when used in the bacterial fecal culture?
a. Evaluation of general flora and predomi-nant species b. Selection of enteric pathogens such as Salmonella, Aeromonas, and others c. Inhibition of normal flora and selection of enteric pathogens d. Enrichment for enteric pathogens such as Salmonella and others