In many species of birds, males are XX and females are XZ. In cases like this, which sex is most likely to display a sex-linked recessive trait?
A) males
B) females
C) Males and females are equally likely to display a sex-linked recessive trait.
D) No Y chromosome is present; therefore, they are not affected by sex-linked recessive traits.
E) the gender that is incubated at a higher temperature
B) females
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With ____ selection(s), the forms of a trait at
both extremes of a range of variation are favored.
a. frequent b. directional c. disruptive d. stabilizing e. mutational
Which condition is associated with an extra copy of chromosome 21?
a. sickle-cell anemia b. Down syndrome c. ALS d. Epilepsy e. Schizophrenia
How would you describe the body of a fungus?
A. tiny threadlike mycelia collectively make up the hypha B. tiny threadlike mycelia collectively make up the septa C. tiny threadlike hyphae collectively make up the mycelium D. tiny threadlike septa collectively make up the mycelium E. tiny threadlike mycelia collectively make up the dikaryote
True or False: Nervous system diseases must always use the respiratory tract as a portal of entry because of its proximity to the brain.
What will be an ideal response?