Quiz about Genotypes and Phenotypes

Question 1

A gene is __________

Accepted Answer

a section of DNA that codes for a trait

Answer

the study of inheritance

Answer

a physical trait

Question 2

A genotype is _____________

Accepted Answer

a combination of alleles

Answer

the physical appearance of an organism

Answer

a genetic mutation

Question 3

A phenotype is ___________

Accepted Answer

the physical appearance of an organism

Answer

a combination of alleles

Answer

a genetic mutation

Question 4

An allele is ___________

Accepted Answer

a variation, or different form, of a gene

Answer

a section of DNA that codes for a trait

Answer

a genetic mutation

Question 5

The genotype yy is ________________

Accepted Answer

homozygous recessive

Answer

homozygous dominant

Answer

heterozygous

Question 6

The genotype TT is __________

Accepted Answer

homozyous dominant

Answer

heterozygous

Answer

homozygous recessive

Question 7

The genotype Qq is _________

Accepted Answer

heterozygous

Answer

homozygous dominant

Answer

homozygous recessive

Question 8

Which of these genotypes is homozygous recessive?

Accepted Answer

rr

Answer

RR

Answer

Rr

Question 9

Which of these genotypes is heterozygous?

Accepted Answer

Mm

Answer

MM

Answer

mm

Question 10

Which of these genotypes is homozygous dominant?

Accepted Answer

TT

Answer

Tt

Answer

tt

Question 11

Dominant (A) red apples

Recessive (a) yellow apples

What percentage of the offspring will be red?

Accepted Answer

75%

Answer

25%

Answer

50%

Answer

100%

Question 12

If all the offspring are purple, what is the genotype of the parent? (hint: it tells you the first letter)

Accepted Answer

PP

Answer

Pp

Answer

pp

Question 13

If half the offpspring are white, and half the offspring are purple, then what is the genotype of the purple parent? (same hint here, it gives you the first letter)

Accepted Answer

Pp

Answer

PP

Answer

pp

Question 14

Two humans are heterozygous for the eye color gene, and brown eyes are dominant. What are the odds of them having a child with blue eyes?

Accepted Answer

25%

Answer

50%

Answer

75%

Answer

100%

Question 15

Pea plants have two alleles for height: (T) for tall and (t) for short. What would the phenotype be for a pea plant that is heterozygous for the height gene?

Accepted Answer

Tall

Answer

Short

Question 16

If red flower color is the dominant allele (R), then what would the genotype of this rose plant be?

Accepted Answer

homozygous recessive

Answer

homozygous dominant

Answer

heterozygous

Question 17

There are two cats that breed together. One parent is homozygous dominant and has a long tail. What percentage of the offspring have long tails?

Accepted Answer

100%

Answer

25%

Answer

50%

Answer

75%

Question 18

The genotype RR is _________

Accepted Answer

homozygous dominant

Answer

heterozygous

Answer

homozygous recessive

Genotypes and Phenotypes

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