What ratio of the offspring from the cross shown will be homozygous recessive for the trait of tallness?
0 in 4
1 in 4
2 in 4
4 in 4
4. Multiple Choice
1 minute
1 pt
Which of the following genotypes is homozygous dominant?
A
Aa
AA
aa
5. Multiple Choice
1 minute
1 pt
Which of the following genotypes is heterozygous?
Bb
BB
bb
B
6. Multiple Choice
20 seconds
1 pt
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
recessive
dominant
lower case letter
both
7. Multiple Choice
30 seconds
1 pt
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?
0%
25%
50%
75%
8. Multiple Choice
30 seconds
1 pt
B = brown fur b = white fur In the punnett square, what is the probability for white fur?
0%
25%
50%
75%
9. Multiple Choice
30 seconds
1 pt
G = green, g = yellow The genotype for a yellow plant is...
GG
Gg
gg
all of the choices result in yellow
10. Multiple Choice
30 seconds
1 pt
T - tall and t = short In the punnett square below, what belongs in the missing square
tt
Tt
Bb
TT
11. Multiple Choice
30 seconds
1 pt
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
recessive
dominant
lower case letter
both
12. Multiple Choice
30 seconds
1 pt
Which of the following is NOT a genotype?
heterozygous
a trait
Bb
homozygous recessive
13. Multiple Choice
3 minutes
1 pt
Which of the following alleles is homozygous (purebred) recessive?
Tt
tt
TT
t
14. Multiple Choice
3 minutes
1 pt
Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?
0 %
25%
50%
75%
15. Multiple Choice
5 minutes
1 pt
What you see, or the physical appearance.
Genotype
Phenotype
Homozygous
Heterozygous
16. Multiple Choice
5 minutes
1 pt
B = brown eyes b = blue eyes What is true about these two brothers that have brown eyes? One has genotype BB the other Bb.
they have same phenotype and genotype
they have different genotypes and phenotypes
they have same phenotype but different genotypes
they have same genotype but different phenotypes
17. Multiple Choice
5 minutes
1 pt
Dominant alleles are represented by a:
Male gene
lowercase letter
recessive trait
capital letter
18. Multiple Choice
30 seconds
1 pt
What is the probability of heterozygous offspring?
25%
50%
0%
100%
19. Multiple Choice
5 minutes
1 pt
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?
0%
25%
50%
75%
20. Multiple Choice
30 seconds
1 pt
What allele combination should go in the missing box?
AA
Aa
aa
none of these
21. Multiple Choice
30 seconds
1 pt
The dominant trait as seen in this punnett square is
yellow pea seeds
green pea seeds
there is no dominant seed
Jolly green giant
22. Multiple Choice
2 minutes
1 pt
What are the possible genotypes for this cross?
TT = 25% Tt= 50% tt=25%
all tall
TT= 75% tt = 25%
Tt = 100%
23. Multiple Choice
30 seconds
1 pt
An organism's appearance or other observable characteristics:
phentoype
genotype
recessive
dominant
24. Multiple Choice
30 seconds
1 pt
An organism's genetic make-up:
phenotype
genotype
dominant
recessive
25. Multiple Choice
3 minutes
1 pt
In the punnett square shown, what must the genotype of the missing parent be?
BB
Bb
bb
Tt
26. Multiple Choice
30 seconds
1 pt
Having two different alleles for a trait (example Hh):
homozygous
heterozygous
dominant
purebred
27. Multiple Choice
3 minutes
1 pt
Aa is
homozygous (purebred)
heterozygous (hybrid)
28. Multiple Choice
3 minutes
1 pt
Which of the following alleles is homozygous (purebred) recessive?
Tt
tt
TT
t
29. Multiple Choice
5 minutes
1 pt
In a flowering plant species, red flower color (R) is dominant over white flower color (r). What is the genotype of any red-flowering plant resulting from this species?
rr
R
RR
RR or Rr
30. Multiple Choice
5 minutes
1 pt
Which of the following is homozygous dominant?
Yy
Y
yy
YY
31. Multiple Choice
1 minute
1 pt
Which of the following is homozygous recessive?
Tt
tt
TT
T
32. Multiple Choice
5 minutes
1 pt
What are the possible genotypes for this cross?
TT = 25% Tt= 50% tt=25%
all tall
TT= 75% tt = 25%
Tt = 100%
33. Multiple Choice
30 seconds
1 pt
In a certain species of plant, the color purple (P) is dominant to the color white (p). According to the Punnett Square, what is the probability of an offspring being white?
25%
0%
100%
50%
34. Multiple Choice
2 minutes
1 pt
Purple (P) is dominant to the white (p). According to the Punnett Square, what is the probability of an offspring being purple?
25%
0%
100%
50%
35. Multiple Choice
5 minutes
1 pt
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?