Deck 6 (slides 29-33) Flashcards
______-_______ genes are genes located on the sex chromosomes.
Sex-linked
Most sex-linked genes are found in the ___ chromosome because it is larger.
X
More than _____ sex-linked genetic disorders have been mapped to the X chromosome.
100
An example of a sex-linked genetic disorder is _________, the inability to distinguish certain colors.
Colorblindness
____ genes are associated with color vision are located on the X chromosome.
3
The most common form of colorblindness is _____-_____ colorblindness.
Red-green
Red-green colorblindness is round in ___ in ____ males and ___ in _____ females.
1, 10, 1, 100
The difference is because males have just ____ X chromosome, so all X-linked genes are expressed in males, even if they are __________.
1, recessive
Sons always inherit this disease from their _______ (never the _______-they get the Y chromosome from the dad).
Mother, father
For the disease to be expressed in females, there must be a copy of the recessive gene on _______ ____ chromosomes.
Both, X
Another example of a sex-linked genetic disorder is ________.
Hemophilia
Two important genes carried on the X chromosome help control _______ clotting.
Blood
The ________ allele in either of these genes can cause hemophilia.
Recessive
Missing the important blood clotting _______ can cause ________ to death from minor cuts or bruises (internal bleeding).
Protein, bleeding
Hemophilia is found in approximately ___ in ________ males.
1; 10,000
