Vocab
Homozygous vs Heterozygous
Phenotype vs Genotype
Punnett Squares
Non-Mendelian
100
Which allele is ALWAYS expressed?
Dominant
100
Green (G) is dominant to brown (g) for anole lizards. What is the genotype of a brown lizard?
gg
100
What are 3 examples of a phenotype?
Physical characteristics- Hair color, Fur texture, eye color, height, etc...
Teacher will check!
100
What percent of the offspring are heterozygous?
50%
100
When both alleles are expressed, this is an example of-
Codominance
200
Which allele is only expressed in a homozygous state?
Recessive
200
Non-waxy corn kernels (N) is dominant to waxy corn kernels (n). A heterozygous non-waxy corn kernel is crossed with a homozygous waxy corn kernel. What are the parents genotypes?
Nn x nn
200
What are 3 examples of a genotype? BE SPECIFIC (think names)
Homozygous Dominant (HH)
Heterozygous (Hh)
Homozygous Recessive (hh)
200
Tall is dominant to short. What percent of the offspring are tall?
100% tall
200
A man with heterozygous B blood marries a women with AB blood. What percentage of the offspring will have A blood type?
25% A
300
What is the genotype made of different alleles?
heterozygous
300
White fur is dominant to gray fur for arctic rabbits. A heterozygous white fur rabbit is crossed with a gray rabbit. What percent of the offspring will be homozygous recessive? (use the letter F)
50% ff or gray fur
300
Dark colored beaks are dominant to light colored beaks in chickens. A chicken with light colored beak is crossed with a homozygous dominant dark colored beak chicken. What percent of the offspring with have dark colored beaks?
100% dark colored beaks
300
Pointed leaves are dominant to round leaves. Two heterozygous pointed leaves are crossed. What percent of the offspring will be heterozygous for the trait? (use the letter L)
50% Ll
300
In horses, the chestnut coloration is incompletely dominant to cremello(white) coloration. Palomino (tan) is the heterozygous phenotype. If a chesnut horse is crossed with a palomino horse, what fraction of the offspring will be palomino?
2/4=1/2 palomino
400
What is the genotype made of the same alleles?
homozygous
400
Tongue rollers are dominant to non-tongue rollers. Two heterozygous tongue rollers are crossed. What fraction of the offspring will be heterozygous for the trait? (use the letter T)
2/4 or 1/2 Tt
400
Having a widow's peak is dominant to a straight hairline. Someone who is homozygous dominant is crossed with a heterozygous widow's peak. What fraction of the offspring will be homozygous dominant? (use the letter H)
1/2 HH
400
Pointed leaves are dominant to round leaves. Two heterozygous pointed leaves are crossed. What are the phenotypic probabilities (%)?
75% pointed leaves and 25% round leaves
400
The ABO blood group has three different alleles: IA, IB, and i. The genotypes and phenotypes (blood types) for different combinations of the three alleles are shown in the table.
What are the phenotype probabilities of a cross between a heterozygous Type A parent and a Type AB parent?
50% A blood
50% AB blood
500
What is a specific characteristic that is controlled by genes?
Trait
500
Curly hair is dominant to straight hair in poodles. Two heterozygous curly haired poodles are crossed. What percent of the offspring will be homozygous dominant? (use the letter H)
25% HH
500
Having dimples is a dominant trait. Someone who is heterozygous for dimples is crossed with someone who has no dimples. What are the phenotypic fractions?
2/4=1/2 Dimples: 2/4=1/2 no dimples
500
Red tomatoes are dominant to green tomatoes. A heterozygous red tomato is crossed with a green tomato plant. What are the percentages of each phenotype?
50% Red
50% Green
500
In leopard geckos, no pigment (NN) is codominant to pigmented (PP) coloration. Leopard geckos that express both traits are will have spots of pigment and no pigment (NP)
When you cross a pignmented leopard gecko with a spotted leopard gecko, what phenotypic and genotypic percentages would occur in the offspring?
50% pigmented and 50% spotted
50% PP and 50% NP