Bio

Question 1

When both alleles are the same.

Answer 1

Homozygous

Question 2

2 different alleles appear in the heterozygous phenotype, but they do not blend.

Answer 2

Codominance

Question 3

alleles for a trait that are different.

Answer 3

heterozygous

Question 4

pairs of alleles separate independently of one another during gamete formation and come back together during fertilization

Answer 4

Law of segregation

Question 5

the inheritance of one trait does not influence the inheritance of another

Answer 5

Law of independent assort

Question 6

what kind of inheritance pattern explains human skin color?

Answer 6

polygenic traits

Question 7

human blood types are examples of what type of inheritance pattern

Answer 7

codominance or multiple alleles

Question 8

shows results of a genetic cross

Answer 8

punnet square

Question 9

trait that is expressed even when a recessive allele is present

Answer 9

dominant

Question 10

trait that is masked by dominant

Answer 10

recessive

Question 11

what explains why a red flower and a white flower can produce a pink flower

Answer 11

incomplete dominance

Question 12

genetic makeup of an organism

Answer 12

genotype

Question 13

physical appearance of an organism

Answer 13

phenotype

Question 14

sex cells

Answer 14

gametes

Question 15

different versions of genes

Answer 15

alleles

Question 16

cross that only tracks one trait

Answer 16

monohybrid cross

Question 17

cross that tracks 2 consisting traits

Answer 17

dihybrid cross

Question 18

father of genetics

Answer 18

gregor mendel

Question 18

when more than 1 gene controls a trait

Answer 18

polygenic inheritance

Question 19

if two parents with dominant phenotypes produce an offspring with a recessive phenotype then what can you say about the parents.

Answer 19

probably heterozygous

Question 20

what kind of organism can you apply to mendels laws of genetics

Answer 20

all organisms

Question 21

how many dominant alleles need to be present in order for the recessive phenotype to be observed in an organism

Answer 21

none

Question 22

where do the pairs of alleles in offspring come from

Answer 22

parents

Question 23

how many alleles do organisms have for every trait/gene

Answer 23

2

Question 24

this type of breeding allows only those organisms with desired characteristics to produce the next generation

Answer 24

selective breeding

Question 25

if an offspring has two X alleles its sex would be what?

Answer 25

female

Question 26

how many alleles control blood type

Answer 26

3

Question 27

failure of homologues to separate during meiosis

Answer 27

nondisjunction

Question 28

chromosomal disorder in which a female is XXX

Answer 28

Metafemale

Question 29

this can bring toether 2 recessive alleles and cause a genetic defect in the offspring

Answer 29

indbreeeding

Question 30

since colorblindness is on the X chromosome it is considered

Answer 30

Sex linked

Question 32

chromosomal disorder in which a female is XXY

Answer 32

kinfelter syndrome

Question 33

autosomal recessive disorder in which a person cannot clear the mucus of their lungs

Answer 33

cystic fibrosis

Question 34

what kind of inheritance explaines eye color

Answer 34

polygenic inheritance

Question 35

this picture of chromosomes arraned in pairs shows homologous chromosomes sex chromosomes and autosomes

Answer 35

karyotype

Question 36

a physician transfers a normal gene into the dna of a person with a mutated form of the gene this is an example of

Answer 36

gene therapy

Question 37

this is the analyzing of sections of DNA that have little or no function

Answer 37

DNA fingerprint

Question 38

what percentage of human sperm carry an X chromosome

Answer 38

50 percent

Question 39

one of the x chromosomes of females can be turned off this off X chromosome forms a dense region in the nucleus and is called

Answer 39

Barr body

Question 40

ongoing effort to analze the human DNA sequence is a project called what

Answer 40

human genome

Question 41

people who are heterozygous with sickle cell anemia are generally healthy because they are resistant to

Answer 41

malaria

Question 42

every other chromosome other than the sex chromosomes are called

Answer 42

autosomes

Question 43

chromosomal disorder in which a female is XO

Answer 43

tuner syndrome

Question 44

this can be used to trace throuhgh several generations

Answer 44

pedigree

Question 45

who determines the gender of the offspring

Answer 45

male father

Question 46

chromosomal disorder in which there are three copies of chromosome 18

Answer 46

edwards syndrome

Question 47

chromosomal disorder in which there are three copies of chromosome 21

Answer 47

down syndrome

Question 48

autosomal dominant neurodegenerative disorder

Answer 48

huntingtons disease

Question 49

codominant genetic disorder

Answer 49

sickle cell anemia

Question 50

sex linked muscle degenerative disorder

Answer 50

duchenne muscular dystrophy

Question 51

autosomal dominant disorder resulting in dwarfism

Answer 51

achondroplasia

Question 52

autosomal recessive disorder that saffects mostly jewish people with eastern european ancestry

Answer 52

Tay-Sachs disease