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WorksheetsGenotypes and Phenotypes
Total questions: 15
Worksheet time: 9mins
Tongue rolling is dominant over not being able to roll your tongue. Let's use the letter "T" to represent the alleles. Which letter would represent the dominant allele?
t
T
Referring to the phenotype of being able to roll your tongue, what genotype would a person have if he was NOT able to roll his tongue?
TT
Tt
tt
The genotype "tt" is ____.
heterozygous
homozygous recessive
homozygous dominant
The genotype "Tt" is ___.
heterozygous
homozygous recessive
homozygous dominant
Purple flowers on a pea plant is dominant to white flowers. What are the 2 possible genotypes of plants with purple flowers?
PP and pp
Pp and pp
PP and Pp
Is it possible for these 2 purple-flowered parent pea plants to have offspring with white flowers?
PP and pp
Yes
No
Two pea plants have purple flowers. Having purple flowers is a dominant trait. The two pea plants are crossed and some of their offspring have white flowers. What MUST the parent genotypes be?
Both PP
Both pp
Both Pp
Being right-handed is a dominant trait. Using the letter R, create the genotype for someone who is homozygous dominant for that trait. The genotype would be (a) .
Knowing that right-handedness is dominant to being left-handed, what PHENOTYPE would a person have if they were heterozygous for the trait?
Left-handed
rr
Right-handed
Rr
Which of the following is a genotype?
red color
left-handed
homozygous dominant
purple flowers
red color
left-handed
homozygous dominant
purple flowers
Using the letter M, the heterozygous genotype would be written as (a) .
How many alleles code for a trait?
1
2
3
4
How many dominant alleles must be present for the organism to display the dominant phenotype?
1
2
3
4
Round seeds (R) are dominant to wrinkled seeds (r) in pea plants. A homozygous recessive plant crosses with a heterozygous plant. What are the genotypes of both plants?
RR X rr
Rr X rr
RR X Rr
Rr X Rr
Round seeds (R) are dominant to wrinkled seeds (r) in pea plants. A homozygous recessive plant crosses with a heterozygous plant. Is is possible that their offspring could have wrinkled seeds?
Yes
No
