The city hired a team of ecologists to study the deer population in the neighborhood bordered by Main Street,
Highway 1, Stately Boulevard, and the river. According to
the team, the neighborhood could support approximately
100 deer. In 2005, the deer population in the area was
approximately 150. In 2010, the population was nearly 400.
Residents are concerned about the dangers associated
with the overpopulation of deer.
Which of the following is a scientific question a
person might ask after reading this article?
O A. How does the deer population affect the
property values in the neighborhood?
O B. Why should the city spend taxpayers'
money on this study?
O C. What factors have changed to cause the
deer population to increase so quickly?
O D. How did the city select this team of
ecologists over other applicants?

c

explanation:

idk

an individual’s sex (i.e., whether they are a male or female) is determined by the sex chromosomes. most people have two sex chromosomes, one that is inherited from their mother and one that is inherited from their father. typically, females have two x chromosomes (xx) and males have one x chromosome and one y chromosome (xy). conditions caused by changes (“mutations”) in genes located on the x chromosome are considered x-linked.

x-linked recessive inheritance

most x-linked conditions are recessive. this means that in a person with two x chromosomes (most females), both copies of a gene (i.e., one on each x chromosome) must have a change or mutation whereas in a person with one x chromosome (most males), only one copy of a gene must have a mutation. a female with a mutation in one copy of a gene on the x chromosome is said to be a “carrier” for an x-linked condition. a male with a mutation in a gene on the x chromosome is typically affected with the condition. because females have two copies of the x chromosome and males have only one x chromosome, x-linked recessive diseases are more common among males than females. however, x-linked recessive diseases can occur in both males and females.

for x-linked recessive disorders, an unaffected carrier mother who has a mutation in a gene on the x chromosome can transmit either the x chromosome with this mutation or a “normal” x chromosome to her children. if the father is unaffected, none of her daughters will be affected and all of her daughters will be unaffected—since they will inherit at least one normal x chromosome from their father. however, each daughter will have a 50% chance of being an unaffected carrier like her mother and a 50% chance of both x chromosomes being normal.