Principles Of Biology

Front 1

Alleles of a gene are found at _____ chromosomes

Back 1

the same locus on homologous

Front 2

all of the offspring of a cross between a black-eyed beetle and an orange-eyed beetle have orange eyes. This means that the allele for the black eyes is _____ the allele for the orange eyes

Back 2

recessive to

Front 3

all the offspring of a cross between a black-eyed rabbit and a red-eyed rabbit have black eyes. what is the expected phenotypic ratio of a cross between two red-eyed rabbits

Back 3

0 black-eyed:

4 red-eyed

Front 4

all the offspring of a cross between a red-flowered plant and a white flowered plant have pink flowers. This means that the allele for red flowers is ____ to the allele for white flowers

Back 4

Incomplete Dominant

Front 5

a color-blind woman carries a man who is not color blind. all of their sons, but none of their daughters, are color-blind. which of the following statements correctly explains these results?

Back 5

the gene for color vision is linked to the X chromosome.

Front 6

Dr. Smith's parents have normal hearing. However, Dr. Smith has an inherited form of deafness. Deafness is a recessive trait that is associated with the abnormal allele d. the normal allele at this locus, associated parents could have which of the following genotypes?

Back 6

Dd and Dd

Front 7

the expression of both alleles for a trait in a heterozygous individual (ex. person with AB blood) illustrates

Back 7

codominace

Front 8

if A is dominant to a and B is dominant to b, what is the expected phenotypic ratio of the cross: AaBb x AaBb?

Back 8

9:3:3:1

Front 9

a mono-hybrid cross is

Back 9

a breeding experiment in which the parents differ in only one character

Front 10

two chromosomes in a nucleus that carry loci for the same traits in the same positions on the chromosomes but specify different versions of some traits constitute a pair of

Back 10

homologous chromosomes

Front 11

Using two six-sided die, what is the probability of rolling a 5 and a 6?

Back 11

1/6 x 1/6 = 1/36

Front 12

what is the excepted phenotypic ratio of the F2 generation of a mono-hybrid cross?

Back 12

3:1

Front 13

which of the following terms to the situation where a single phenotypic characteristics is determined by the addictive effects of two or more genes?

Back 13

polygenic inheritance

Front 14

what are genetically linked genes?

Back 14

genes whose loci are nearer to each other are less likely to be separated onto different chromatids during chromosomal crossover

Front 15

what does Mendal's 1:2:1 ratio describe?

Back 15

Genotype

Front 16

What does it mean when " a man and woman have children, the man determines the sex of the child?

Back 16

a women will always donate the X chromosome to the zygote, while the male can neither donate another X chromosome to make the child a female or a Y chromosome to make the child a male

Front 17

What is a di-hybrid cross?

Back 17

mating between to heterozygous organisms (Pp)

Front 18

what is a dominate allele?

Back 18

will express its's phenotype of that of a recessive allele

Front 19

what is a dominant genetic disorder?

Back 19

individuals who are homozygous recessive are symptom free

Front 20

what is a genotype?

Back 20

genetic makeup of an organism (PP)

Front 21

what is karyotype?

Back 21

image of individuals chromosomes arranged from longest to shortest

Front 22

what is mono-hybrid cross?

Back 22

mating between two individuals with different alleles at one genetic locus of interest

Front 23

what is an allele?

Back 23

different versions of the game gene (P or p)

Front 24

what is a phenotype?

Back 24

appearance or expression of a characteristics (purple)

Front 25

what is a recessive allele?

Back 25

will only express it's phenotype when paired with another recessive allele

Front 26

what is a recessive genetic disorder?

Back 26

individuals who get the disorder are homozygous recessive

Front 27

what is a testcross?

Back 27

mating between an individual of unknown genotype and a homozygous individual

Front 28

what is complete dominance?

Back 28

if 2 alleles have a complete dominance relationship, the phenotype of the heterozygote will be indistinguishable from the phenotype of the homozygous dominant.

Front 29

what is heterozygous?

Back 29

has two different alleles (Pp)

Front 30

what is homozygous?

Back 30

has identical alleles (PP or pp)

Front 31

what is hybrid?

Back 31

cross fertilization offspring of 2 different varieties

Front 32

what is incomplete dominance?

Back 32

heterozygous differ from homozygous phenotypes

example: colors -- (pink, red, white)

Front 33

what is Mendal's Law of Segregation?

Back 33

2 copies of agent seperate in meiosis and end up in different gametes. Gametes carry only one allele for each gene

Front 34

what is pleiotropy inheritance?

Back 34

one gene controls more than one phenotypic trait

example: sickle cell

Front 35

what is polygenic inheritance?

Back 35

many genes influence one trait

example: skin color

Front 36

what is Codominance?

Back 36

heterozygotes express 2 dominant alleles

example: blood types

Front 37

What is true breeding?

Back 37

self-fertilization produces offspring identical to parent

Front 38

what is the significance of Mendel's 3:1 ratio?

Back 38

Phenotype