Quiz about Genetics Review

Question 1

The "Father of Genetics"

Accepted Answer

Gregor Mendel

Answer

Isaac Newton

Answer

Albert Einstein

Answer

Robert Hooke

Question 2

The term for the different forms of a trait.

Accepted Answer

Alleles

Answer

DNA

Answer

Chromosomes

Answer

Genes

Question 3

The trait that always shows.

Accepted Answer

Dominant

Answer

Recessive

Answer

Hidden

Answer

Overt

Question 4

The hidden trait.  You need two of these alleles for the trait to show.

Accepted Answer

Recessive

Answer

Dominant

Answer

Hidden

Answer

Overt

Question 5

The genetic makeup of a trait.  (The letters represent this)

Accepted Answer

Genotype

Answer

Genes

Answer

Phenotype

Answer

Characteristics

Question 6

If a trait is homozygous the letters are the

Accepted Answer

Same

Answer

Different

Question 7

If you are homozygous recessive, the genotype would be

Accepted Answer

aa

Answer

AA

Answer

Aa

Question 8

If you are homozygous dominant, the genotype would be

Accepted Answer

AA

Answer

aa

Answer

Aa

Question 9

If a trait is heterozygous, the letters (alleles)are

Accepted Answer

Different

Answer

The same

Question 10

If you are heterozygous, your genotype would be

Accepted Answer

Aa

Answer

AA

Answer

aa

Question 11

Another term for homozygous is

Accepted Answer

Purebred

Answer

Hybrid

Answer

Recessive

Answer

Dominant

Question 12

Another term for heterozygous is

Accepted Answer

Hybrid

Answer

Purebred

Answer

Dominant

Answer

Recessive

Question 13

The law that states that when an organism is hybrid for a pair of contrasting traits, the dominant trait is the one that is shown.

Accepted Answer

Law of Dominance

Answer

Law of Independent Assortment

Answer

Law of of Segregation

Answer

Law of Incomplete Dominance

Question 14

How many alleles do you inherit from EACH parent for a specific trait?

Accepted Answer

1

Answer

2

Question 15

A tool used to predict the probability of offspring inheriting certain traits is called a ...

Accepted Answer

Punnett Square

Answer

karyotype

Question 16

The study of heredity is called ....

Accepted Answer

genetics

Answer

biology

Answer

chemistry

Question 17

The physical expression of a trait is called the ...

Accepted Answer

phenotype

Answer

genotype

Question 18

Segments of DNA that code for traits are called ....

Accepted Answer

genes

Answer

proteins

Answer

alleles

Question 19

Genotype: TT

Accepted Answer

homozygous dominant

Answer

homozygous recessive

Answer

heterozygous dominant

Question 20

Genotype: Aa

Accepted Answer

heterozygous dominant

Answer

homozygous dominant

Answer

homozygous recessive

Question 21

Cross 2 heterozygous tall pea plants. Tall (T) is dominant to short (t). What fraction of the offspring do you predict will be tall?

Accepted Answer

3/4

Answer

1/4

Answer

2/4

Answer

4/4

Question 22

Which statement below describes DOMINANT alleles?

Accepted Answer

expressed when at least one is present

Answer

only expressed when 2 are present

Question 23

Which of the following is a PHENOTYPE for flower color in pea plants?

Accepted Answer

Purple

Answer

Pp

Answer

PP

Question 24

The trait or allele that is expressed when only one is present is called the ___________ trait.

Accepted Answer

dominant

Answer

recessive

Question 25

In pea plants, tall (T) is dominant over short (t). If two heterozygous tall pea plants are mated, what is the the expected genotypic ratio of their offspring?

Accepted Answer

1 TT : 2 Tt : 1 tt

Answer

3 tall : 1 short

Question 26

In the problem shown, what must the genotype of the missing parent be?

Accepted Answer

Bb

Answer

BB

Answer

bb

Question 27

The different forms or versions of a gene are called ...

Accepted Answer

alleles

Answer

gametes

Question 28

Mendel's Law of Segregation is shown on the outside of a Punnett Square. According to this law, the genes from each parent _____ when gametes are formed.

Accepted Answer

separate

Answer

combine as one

Answer

mutliply

Question 29

In humans, freckles (F) on the skin are dominant to no freckles (f). If a heterozygous parent and a recessive parent conceive, what is the chances of having a child with NO FRECKLES?

Accepted Answer

50%

Answer

0%

Answer

100%

Question 30

Having freckles is a dominant trait in humans. A girl has freckles, but her brother does not. What do we know for certain about the parents?

Accepted Answer

both parents have at least one recessive allele

Answer

both parents are heterozygous for freckles

Answer

one of the parents does not have freckles

Question 31

In a population of bees, long wings (L) are dominant over short wings (l). Bees with long wings are ...

Accepted Answer

heterozygous or

homozygous

dominant (LL or Ll)

Answer

heterozygous only (Ll)

Answer

homozygous

dominant only (LL)

Question 32

In guinea pigs, the allele for rough coat (R) is dominant over the allele for smooth coat (r). A homozygous dominant guinea pig and a homozygous recessive guinea pig are mated.

What would be the phenotype of the offspring?

Accepted Answer

100% rough coat

Answer

100% smooth coat

Question 33

Genotype: rr

Accepted Answer

homozygous recessive

Answer

homozygous dominant

Answer

heterozygous dominant

Question 34

Which statement below describes RECESSIVE alleles?

Accepted Answer

only expressed when 2 are present

Answer

expressed when at least one is present

Question 35

In pea plants, the trait for tall stems is dominant over the trait for short stems. If two heterozygous tall plants are crossed, what percentage of the offspring would be expected to have the same phenotype as the parents?

Accepted Answer

75%

Answer

100%

Answer

50%

Answer

25%

Question 36

The observable traits of an organism are known as its

Accepted Answer

phenotype

Answer

allele

Answer

dominance

Answer

genotype

Question 37

Each parent contributes one of the genes for a particular trait. The genes of the pair are called:

Accepted Answer

alleles

Answer

variables

Answer

gametes

Answer

hybrids

Question 38

In snapdragons, Tallness (T) is dominant to dwarfness (t). In a cross between two plants that are homozygous for the recessive allele, the percent of offspring expected to exhibit tallness is

Accepted Answer

0%

Answer

25%

Answer

75%

Answer

100%

Question 39

The color black is dominant in guinea pigs. The phenotypes of homozygous black guinea pigs and heterozygous black guinea pigs are:

Accepted Answer

black

Answer

gray

Answer

BB and Bb

Answer

white

Question 40

The gene makeup of an organism for a particular trait is known as its

Accepted Answer

genotype

Answer

dominance

Answer

phenotype

Answer

allele

Question 41

What is the percentage of homozygous recessive offspring?

Accepted Answer

50%

Answer

0%

Answer

25%

Answer

75%

Question 42

Green peas are dominant (G) to yellow peas (g). What is the genotype for a hetereozygous dominant offspring?

Accepted Answer

Gg

Answer

gg

Answer

GG

Question 43

In Mendel's pea plants, the homozygous recessive phenotype was white flowers.  If Mendel crossed two homozygous recessive pea plants, what color flowers would be seen in the offspring?

Accepted Answer

white

Answer

white and purple

Answer

purple

Answer

lavendar

Question 44

What percentage of the offspring will be purebred dominant?

Accepted Answer

25%

Answer

0%

Answer

50%

Answer

75%

Question 45

Dominant alleles are represented by a(n)

Accepted Answer

upper case letter

Answer

phenotype

Answer

lower case letter

Answer

punnett square

Question 46

True or False:
A heterozygous dominant trait can be written as BB.

Accepted Answer

False

Answer

True

Question 47

D = dimples d = no dimples
What is the genotype for a homozygous recessive offspring?

Accepted Answer

dd

Answer

DD

Answer

Dd

Question 48

What is the percentage of a homozyogus dominant offspring?

Accepted Answer

0%

Answer

75%

Answer

50%

Answer

25%

Question 49

Round (R) seeds are dominant to wrinkled (r) seeds.
What is the genotype for a homozygous dominant offspring?

Accepted Answer

RR

Answer

Rr

Answer

rr

Question 50

If two purebred species (BB) are crossed, what percentage of their offspring would be BB?

Accepted Answer

100%

Answer

25%

Answer

50%

Answer

75%

Question 51

What percentage of the offspring will be heterozygous dominant?

Accepted Answer

50%

Answer

100%

Answer

75%

Answer

25%

Question 52

What percentage of the possible offspring will be hybrids?

Accepted Answer

50%

Answer

25%

Answer

75%

Answer

100%

Genetics Review

52 questions

The "Father of Genetics"

The term for the different forms of a trait.

The trait that always shows.

The hidden trait. You need two of these alleles for the trait to show.

The genetic makeup of a trait. (The letters represent this)

If a trait is homozygous the letters are the

If you are homozygous recessive, the genotype would be

If you are homozygous dominant, the genotype would be

If a trait is heterozygous, the letters (alleles)are

If you are heterozygous, your genotype would be

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