Answer:
Option D
Explanation:
Options for the question
A) The Y chromosome is slower to mature than the X chromosome.
B) Replication of the X chromosome occurs more often in males.
C) Male hormones cause the expression of X-linked traits.
D) Males only have one copy of the X chromosome
Given-
Duchenne muscular dystrophy (DMD) is an X-linked recessive condition which means it will occur in male even if they have one diseased X gene. While females will have this disease only when they have two diseased X gene
Hence, in most of the cases women with only one diseased X chromosome act as carrier and show normal traits.
Let us assume X is normal gene and X' is the diseased gene then
Genotype of normal father will be - XY
Genotype of carrier mother will be - XX'
Now if these two mates, following offspring will be produced
XY * XX'
XX, XX', XY, X'Y
So the male with X'Y will have DMD
Hence, option D is correct
Stay on task, late work stacks up fast. Don't be afraid to ask questions. Don't wait to study until right before the test, spread out studying throughout the unit. From someone taking two AP classes, they aren't easy but with hard work, they are worth it in the end.
A nebula is an enormous cloud of dust and gas occupying the space between stars and acting as a nursery for new stars. The roots of the word come from Latin nebula, which means a “mist, vapor, fog, smoke, exhalation.” Nebulae are made up of dust, basic elements such as hydrogen and other ionized gases.
Answer:
<h3>thx</h3>
the process by which plants and animals make their own food in presence of water and
Answer:
Monopolistic competition
Explanation:
If Nori's company decisions need to be made taking the decisions of competing companies into account, it means that Nori's company operates in Monopolistic competition. This is because Monopolistic competition is an economic concept, which presents a situation where a company has several competitors. In this type of market, the decisions of a company in relation to production, distribution and price, interfere in the decisions of its competitors, who need to maintain competition and look for a way to obtain advantages.
