Quiz about Heredity and Genetics Punnett Squares

Question 1

In a heterozygous genotype, the ___________ allele takes over in the phenotype.

Accepted Answer

dominant

Answer

recessive

Answer

lower case letter

Answer

both

Question 2

T - tall and t = short
In the punnett square below, what belongs in the missing square

Accepted Answer

tt

Answer

Tt

Answer

Bb

Answer

TT

Question 3

G = green, g = yellow
The genotype for a yellow plant is...

Accepted Answer

gg

Answer

GG

Answer

Gg

Answer

all of the choices result in yellow

Question 4

B = brown fur b = white fur
In the punnett square, what is the probability for white fur?

Accepted Answer

50%

Answer

0%

Answer

25%

Answer

75%

Question 5

In the punnett square shown, what is the genotypes of the two parents?

Accepted Answer

RR and WW

Answer

RW and RR

Answer

RW and WW

Answer

RW and RR

Question 6

In plants, tall (T) is dominant to short (t). Perform the following cross: Tt x Tt. What is the probability of producing a short plant?

Accepted Answer

25%

Answer

0%

Answer

50%

Answer

75%

Question 7

B = brown fur b = white fur

In the punnett square, what is the probability for brown fur?

Accepted Answer

50%

Answer

0%

Answer

25%

Answer

75%

Question 8

Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?

Accepted Answer

25%

Answer

0 %

Answer

50%

Answer

75%

Question 9

A person heterozygous for wet earwax (Ww) mates with a person homozygous recessive for dry earwax. What is the chance their baby is heterozygous?

Accepted Answer

50%

Answer

0%

Answer

25%

Answer

100%

Question 10

Aa is

Accepted Answer

heterozygous (hybrid)

Answer

homozygous (purebred)

Question 11

In plants, tall (T) is dominant to short (t). Perform the following cross: Tt x Tt. What is the probability of producing a tall plant?

Accepted Answer

75%

Answer

0%

Answer

25%

Answer

50%

Question 12

If a pea plant were homozygous recessive for height, how would its alleles be represented?

Accepted Answer

tt

Answer

TT

Answer

Tt

Answer

tT

Question 13

Recessive alleles may not be expressed because they are

Accepted Answer

masked by a dominant allele

Answer

the least common allele in a population.

Answer

the most common allele in a population.

Answer

less likely to have crossing over.

Question 14

Different forms of genes:

Accepted Answer

alleles

Answer

phenotype

Answer

genotype

Answer

homologous chromosomes

Question 15

What is another way of saying "purebred"?

Accepted Answer

homozygous

Answer

dominant

Answer

recessive

Answer

heterozygous

Question 16

An organism's genetic make-up:

Accepted Answer

genotype

Answer

phenotype

Answer

dominant

Answer

recessive

Question 17

Having two of the SAME alleles for a trait (example HH or hh):

Accepted Answer

homozygous

Answer

heterozygous

Answer

recessive

Answer

dominant

Question 18

Having two different alleles for a trait (example Hh):

Accepted Answer

heterozygous

Answer

homozygous

Answer

dominant

Answer

purebred

Question 19

Which of the following is a phenotype?

Accepted Answer

red hair

Answer

Aa

Answer

heterozygous

Answer

BB

Question 20

What is the definition of phenotype?

Accepted Answer

An organisms appearance or other detectabe characteristics.

Answer

The traits of an organism and how the organism grows

Answer

Dominant and reccessive alleles

Answer

The genetic makeup of an organism/ the combo of genes for one or more specific traits

Question 21

R=round seed
r=wrinkled seed.
Cross a homozygous round with a wrinkled. Which statement predicts the results?

Accepted Answer

offspring will be Rr

Answer

offspring will be RR

Answer

round seeds will be recessive to wrinkled

Answer

Wrinkled will be observed in half of offspring

Question 22

The dominant trait as seen in this punnett square is

Accepted Answer

yellow pea seeds

Answer

green pea seeds

Answer

there is no dominant seed

Answer

Jolly green giant

Question 23

Red flower (R) color is dominant to white flower (r) color in rose plants. What is the  expected phenotypic results of a cross between two heterozygous (Rr) rose plants?

Accepted Answer

75% red, 25% white

Answer

100% red

Answer

50% red, 50% white

Answer

75% white, 25% red

Question 24

Two heterozygous parents produce offspring. What is the probability of the HOMOZYGOUS DOMINANT GENOTYPE appearing in the offspring generation?

Accepted Answer

25%

Answer

75%

Answer

50%

Answer

100%

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