terms and definitions
mode of inheritance
Punnett squares and pedigrees
explanation
blood is thicker than water
100
A genotype with two different alleles- one dominant and one recessive.
What is heterozygous?
100
The mode of inheritance that is a result of two heterozygous parents for a trait producing offspring with 75% of the trait.
What is dominant inheritance?
100
Having a widow's peak is dominant. If a woman without a peak marries a man heterozygous for a peak, what % of children will have a peak?
What is 50%
100
What two terms are described by saying one allele is masked by the other's presence.
What is dominant and recessive
100
The four basic blood types.
What is A, B, AB, and O
200
The physical trait you generally see as a result of the genotype of an individual.
What is a phenotype?
200
The mode of inheritance where males are more affected by a trait than females.
What is X-linked inheritance?
200
Fly eye color is X-linked. If a male with white (recessive) eyes mates with a homozygous red--eyed female, what percent of their male offspring will have white eyes? Females?
What is 0% for both
200
What is one way yo distinguish between dominant and recessive pedigree charts?
One of the below:
What is recessive affected comes from unaffected parents
Recessive skips generations
In dominant, an affected child must have at least one affected parent.
200
The likely genotype of the parents of four children that all have type AB blood.
What is AA and BB
300
When a dominant and recessive allele result in an intermediate phenotype as heterozygotes. FOr example: When a black rat and white rat breed to produce a brown rat.
What is incomplete dominance?
300
The mode of inheritance in which a person with type A blood marries and person with type B blood and produces children with type AB blood.
What is Codominant inheritance?
300
Assess the mode of inheritance of the following pedigree:
What is autosomal dominant
300
2 Key differences between autosomal and X-linked recessive pedigrees.
What is: Father never passes trait to son
More males affected than females
Affected female must have an affected father
An affected female will always have affected sons.
300
The parent genotypes that produce children with all possible blood types.
What is AO and BO
400
When a dominant and recessive allele produce a phenotype representing both forms of the phenotype. For example: a black cow and a white cow produce a spotted cow.
What is codominance?
400
What type of inheritance describes this situation:
A hairless male cat and hairy female cat breed and have kittens. This results in 3 hairy female kittens, 1 hairy male kitten, 3 hairless male kittens, and one hairless female kitten.
What is Recessive x-linked inheritance?
400
What mode of inheritance:
What is x-linked?
400
What is the main reason that x-linked traits appear in males most often?
What is males only have one X chromosome, so there is not a second X to mask a recessive trait like in females.
400
Father #1 has type O blood, father #2 has type A blood. The mother has type AB and the child has type AB. Which is the likely father and why?
Father #2, child can only receive either an A or B from mom and needs the alternate from the father. An OO genotype can provide neither.
500
A trait that is coded for by multiple allele combinations interacting.
What is a polygenic trait?
500
The mode of inheritance that describes a mating couple without a disease that have 50% homozygous dominant and 50% recessive grandchildren?
What is autosomal recessive?
500
If 50% of the offspring are homozygous recessive and 50% are heterozygous, what are the parental genotypes?
What is one is homozygous recessive and the other heterozygous.
500
Compare and contrast codominance and polygenic inheritance.
What is two alleles both show up in the phenotype of the individual as codominance and polygenic as intereaction of multiple alleles creating a range of phenotypes.
500
Shows that blood typing is considered codominant.
What is the expression of both A and B blood type in AB blood.