Mendell's Study Guide #2

Question 1

cystic fibrosis

Answer 1

is the most common fatal genetic disease in the united states

Question 2

genetic disorder

Answer 2

expeected in 1/4 of the child of two carriers of a recessive allele

Question 3

mendelian traits

Answer 3

about thousands human genetic disorders are known to be inherited as mendelian traits

Question 4

PKU

Answer 4

most people afflicted with PKU are born to normal parents who are heterozygous

Question 5

human genetic disorders

Answer 5

most serious human genetic disorders are recessibve

Question 6

cysitc fibrosis

Answer 6

is the most common among caucasians

Question 7

genetic diseases

Answer 7

not evently distributed among ethnic groups

Question 8

socities and marriage

Answer 8

most societies have taboos and laws against marriage between close relatives

Question 9

carriers

Answer 9

half of the offspring of two carriers of a recessive allele are likely to be carriers

Question 10

dominant alleles

Answer 10

are not neccesairly more common in population than recessive alleles

Question 11

lethal dominant allels

Answer 11

are less common than lethal recessive allele

Question 12

tay sacs

Answer 12

is seen among jews from central europe

Question 13

achondroplasia

Answer 13

form of dwarfism caused by a cominant allele

Question 14

inbreeding and geneticts

Answer 14

geneticits debate that inbreeding always increases the risk of inherited diseases

Question 15

huntington’s disease

Answer 15

lethal, but does not strike until middle age

Question 16

symptons cytsis fibrosis

Answer 16

symptoons of PKU include excess mucus in the lungs and digestive tract

Question 17

extra fingers and toes

Answer 17

dominant trait

Question 18

sickle-cell disease

Answer 18

common among african americans

Question 19

huntington’s

Answer 19

now a test to know if you may develop huntingonts’

Question 20

child with galactosemia

Answer 20

are usually offspring of heterozygous parents