Vocabulary
Punnett Squares
Punnett Squares Continued
Pedigrees
100
Having the same alleles: BB, bb
Homozygous
100
Huntington's disease is a genetic brain disorder caused by a dominant allele (H). If an affected man (Hh) and an unaffected woman (hh) have children, what percentage of their offspring are at risk for developing the disease?
50%
100
Dad is heterozygous for free earlobes and mom is homozygous for attached earlobes. Complete the punnett square to include the alleles for the parents along with the genotypes for the offspring.
Father is Ee
Mother is ee
100
How many generations are shown in the pedigree above?
4
200
A trait that can cover another: BLACK FUR covers whit fur. Upper-case letter represents the allele
Dominant
200
Cystic Fibrosis is a recessive autosomal disorder of the lungs. If two healthy parents married, but they knew they were both carriers (Cc) for the disorder, what is the probability that their children may get cystic fibrosis?
25%
200
In humans, the allele for having a straight thumb is dominant to the allele for having a curved thumb. A male is homozygous dominant for straight thumbs, and a female has curved thumbs. What is the possibility that their offspring has curved thumbs?
0%
200
The diagram shows a pedigree of a family with a recessive inherited disease.
If H represents the dominant allele and h represents the recessive allele, what are the genotypes of the parents (with "?") shown in the pedigree?
Hh and Hh
300
A trait that can be covered: WHITE FUR is covered by black fur. Lower-case letter represents the allele
Recessive
300
Pea Blight, a disease in pea plant results when a plant is homozygous recessive for the trait (tt).
If two pea plant parents do NOT have Pea Blight, but have pea plant offspring with the Pea Blight, what is the genotypes of the two parents?
Tt x Tt
300
Refer to the illustration below. What is the phenotype represented in the box labeled # 1?
Round, yellow
300
Consider the pedigree below showing the inheritance of a recessive trait. Hint: remember what the empty and full boxes mean.
Part A
What options below could be the genotypes of the parents in the first generation?
Rr x Rr
400
Having different alleles: Bb
Heterozygous
400
Genotypes of Pea Plants
Below are 7 different Pea Plants.
Select all the pea plants that are homozygous.
AA
cc
Rr
Ff
kk
LL
Pp
AA
cc
kk
LL
400
In snapdragons, red (R) is incompletely dominant over white (r). A heterozygous individual results in a pink flower.
What should the letters be in the blanks above the Punnett square?
______ _______
RR (red)
400
Consider the pedigree below showing the inheritance of a recessive trait. Hint: remember what the empty and full boxes mean.
What is the genotype of the first individual in generation II?
rr
500
The physical trait that is expressed, such as black fur or white fur.
Phenotype
500
Which Punnett square shows a cross between a heterozygous tall (Tt) plant and a homozygous short (tt) pea plant?
C
500
A black sheep (BB) is incompletely dominant over white sheep (bb). What is the genotype and phenotype of the offspring?
(Hint: Do a Punnett square on paper.)
Bb, gray
500
Consider the pedigree below showing the inheritance of a recessive trait. Hint: remember what the empty and full boxes mean.
What is the genotype of the grandmother (the oldest female) in this family?
Rr