AP BIOLOGY

HEREDITY

GENE INTERACTIONS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Sex linked traits are more common in males because
A
Most sex-linked traits are carried on the X chromosome; males only have 1 X-it only takes 1 malfunctioning gene to create trait
B
Females are more likely to inherit sex-linked traits
C
Females have 1 sex chromosome & males have 2
D
Males have 1 sex chromosome and females have 1
Explanation: 

Detailed explanation-1: -Sex Linked In humans, the term often refers to traits or disorders influenced by genes on the X chromosome, as it contains many more genes than the smaller Y chromosome. Males, who have only a single copy of the X chromosome, are more likely to be affected by a sex-linked disorder than females, who have two copies.

Detailed explanation-2: -X-linked recessive inheritance 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.

Detailed explanation-3: -Genes on either the X or the Y have unusual inheritance patterns and are called sex-linked, but X-linkage is much more common than Y-linkage (since there are many more genes on the X than the Y).

Detailed explanation-4: -Genes that are carried by either sex chromosome are said to be sex linked. Men normally have an X and a Y combination of sex chromosomes, while women have two X’s. Since only men inherit Y chromosomes, they are the only ones to inherit Y-linked traits.

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