unit 8- sex-linked traits

Question 1

define autosomal

Answer 1

genetic traits on chromosomes 1-22 and that are not impacted by sex

Question 2

define sex-linked

Answer 2

genetic traits on the X and Y chromosomes

Question 3

what are females

Answer 3

XX

Question 4

what are males

Answer 4

XY

Question 5

which sex chromosome has less genes

Answer 5

the Y chromosome

Question 6

where do males get their X chromosome from

Answer 6

their mothers

Question 7

where do females get their X chromosomes from

Answer 7

one from their mother and one from their father

Question 8

why are men more at risk for x-linked diseases

Answer 8

because men only have 1 X chromosome, so they have a higher percentage

Question 9

what are three examples of X- linked diseases

Answer 9

1. red and green colorblindness
2. hemophilia
3. male pattern hair loss

Question 10

how are sex-linked traits modeled

Answer 10

use capital X and Y to represent the chromosomes from each parent with the allele represented as a superscript

Question 11

what is hemophilia

Answer 11

hemophilia is a blood condition that is a recessive X-linked trait

Question 12

how is hemophilia represented

Answer 12

X^H= non hemophilic allele
X^h= hemophiliac allele

Question 13

hemophilia female genotype and phenotype

Answer 13

X^H X^H= normal
X^H X^h= normal (carrier)
X^h X^h= hemophilia

Question 14

hemophilia male genotype and phenotype

Answer 14

X^HY=normal
X^hY=hemophilia