The correct answer is Drive-reduction theory
Explanation:
In psychology, motivation is a factor that triggers a specific behavior or action. Moreover, motivations have been widely studied and analyzed using different theories and approaches. One of these is the drive-reduction theory; this theory explains motivations are related to inner drives or biological/psychological impulses and a desire to meet those impulses. For example, the drive to eat and the desire to meet this drive motivated the first humans to hunt. According to this, it is the drive-reduction theory the one that states internal tension or drives trigger motivations.
Answer:
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Explanation:
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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
