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WorksheetsGenetics and Blood Type Review
Total questions: 20
Worksheet time: 20mins
Which of the following would be considered homozygous recessive
AA
Aa
aa
AaA
Which of the following is considered heterozygous?
AA
Aa
aa
AaA
___________are different forms of the same gene that are always found on the same position of two homologous chromosomes.
alleles
chromatids
phenotypes
genotypes
During fertilization, offspring receive ______ allele(s) from each parent for a trait
4
3
2
1
What is a genotype?
alternative form of a gene
the physical characteristics of a trait
specific set of genes for a trait
the study of biological inheritance
What is a phenotype?
alternative form of a gene
the physical characteristics of a trait
specific set of genes for a trait
the study of biological inheritance
What is the purpose of a Punnett square?
To predict how many offspring will be produced
To track traits through family generations
To investigate blood types
To predict the probability of what type of offspring can be produced
What is the purpose of a pedigree?
To predict how many offspring will be produced
To track traits through family generations
To investigate blood types
To predict the probability of what type of offspring can be produced
which combination would produce a 1:2:1 ratio of genotypes and a 3:1 ratio of phenotypes?
AA x aa
AA x AA
Aa x Aa
aa x aa
In a dihybrid cross, what is the ratio for phenotype between organisms that are heterozygous for both traits (RrYy)
1:2:1
9:3:3:1
3:1
4:2:2:1
What is the probability that a homozygous recessive offspring will be produced between two heterozygous parents?
100%
75%
50%
25%
50% of the offspring are heterozygous and the other 50% are homozygous recessive; what are the genotypes of the parents?
Rr x rr
RR x rr
Rr x Rr
RR x Rr
If one of your parents is heterozygous for blood type A and the other is homozygous for type B, what are the possible blood types you could be ?
AB or B
AB, B, or O
AB or O
AB, B, or A
The father is type A and the mother is type B. Both have the recessive allele for blood type O. What is the probability that these parents will have offspring with type A blood?
100%
75%
0%
25%
BB produces black feathers, WW produces white feathers, and BW produces black and white feathers. This is an example of
incomplete dominance
codominance
heterozygous dominance
genetic mutation
A bean plant with a GG genotype is crossed with a second plant that has the gg genotype. What is the probability that the offspring will show the dominant trait?
0%
25%
75%
100%
In a pedigree, which shape represents a male?
circle
square
star
triangle
In a pedigree, which shape represents a female?
circle
square
star
triangle
In a pedigree, how would an affected female be represented?
there would be a * by the circle
the circle would be underlined
the circle would be shaded in
the circle would be highlighted
Which of the following would be considered homozygous dominant?
AA
Aa
aa
AaA
