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WorksheetsBIO 101 Lab 8 - Genetics Hybrid Fall 2020
Total questions: 46
Worksheet time: 4hrs 50mins
____________ is the study of heredity.
genetics
biology
ecology
statistics
_______________, the unit of inheritance, are located on chromosomes.
chromosomes
alleles
traits
genes
How many chromosomes does a human have?
12
23
46
92
How many chromosomes do you get from your mother?
12
18
23
46
How many chromosomes do you get from your father?
12
18
23
46
The different versions of genes are called ____________; each individual inherits two ___________ for a trait (one from each parent).
genes
alleles
homozygote
heteroygote
____________________ refers to the physical characteristic (that you “see”), such as tall, green, or wrinkled.
phenotype
genotype
b = blue eyes
What is true about these two brothers that have brown eyes?
One has genotype BB the other Bb.
Which of the following is homozygous dominant?
rr
AA
Tt
Ff
What is the relationship between phenotype and genotype?
The phenotype determines the genotype.
The genotype determines the phenotype.
There is no relationship between phenotype and genotype.
____________________ means the two alleles are the same (“PP” or “pp”)
Homozygous
Heterozygous
__________________________ means the two alleles are different (“Pp”)
Homozygous
Heterozygous
Some traits demonstrate _____________________________, in which one allele, the dominant allele, completely masks the other, recessive allele.
Complete dominance
Incomplete dominance
Co-dominance
Pleiotrophy
___________________ trait - the trait is expressed - represented by a capital letter
Dominant
Recessive
___________________ trait - the trait is masked (if a capital letter is in the genotype) - represented by a lowercase letter; It takes two of them for the trait to be expressed
Dominant
Recessive
Brown eyes (B) are dominant over blue eyes (b). What is the genotype of a person who is homozygous dominant for brown eyes?
BB
Bb
bb
brown eyes
blue eyes
Brown eyes (B) are dominant over blue eyes (b). What is the genotype of a person who has blue eyes?
BB
Bb
bb
brown eyes
blue eyes
Brown eyes (B) are dominant over blue eyes (b). What is the genotype of a person who is heterozygous for eye color?
BB
Bb
bb
brown eyes
blue eyes
When Mendel crossed true-breeding tall plants (TT) with true-breeding short plants (tt), all of the offspring were tall because...
The allele for tall plants is recessive.
The allele for short plants is dominant.
The allele for tall plants is dominant
Is a cross between two different lines/genes that differ in two observed traits.
Punnett square
Phenotype
Dominant
Recessive
Dihybrid cross
Which of the following is a genetic cross between two purebred pea plants (known as a TEST CROSS)?
Tt x Tt
Tt x tt
TT x tt
None of the answers are correct
Calculate the % green for the class data.
0.75%
75%
0.80%
80%
Calculate the expected number for purple, smooth peas. Remember: Expected # = (phenotypic ratio x total kernels observed)
34.3
11.4
102.9
98
Calculate the expected number for purple, wrinkled peas. Remember: Expected # = (phenotypic ratio x total kernels observed)
34.3
11.4
102.9
98
Calculate the expected number for yellow, smooth peas. Remember: Expected # = (phenotypic ratio x total kernels observed)
34.3
11.4
102.9
98
Calculate the expected number for yellow, wrinkled peas. Remember: Expected # = (phenotypic ratio x total kernels observed)
34.3
11.4
102.9
98
The ability to taste the chemical PTC is determined by a single gene in humans with the ability to taste given by the dominant allele T and inability to taste by the recessive allele t. Suppose two heterozygous tasters (Tt) have a large family.
Predict the proportion of their children who will be tasters and nontasters. Use a Punnett square to illustrate how you make these predictions.
1:2:1 or 25%:50%:25%
1:1 or 50%:50%
3:1 or 75%:25%
1:3 or 25%:75%
A rooster with grey feathers is mated with a hen of the same phenotype. Among their offspring 15
chicks are grey (Gg), 6 are black (GG) and 8 are white (gg). What is the simplest explanation for the inheritance of these colors in chickens? What kind of inheritance is shown in this problem? What are both parents genotypes? Use 2 answers!
complete dominance
incomplete dominance
GG
Gg
gg
In a certain plant, blue (B) flower color is dominant to white (b). You have a blue flowered plant and a white flowered plant. What are the two possibilities for genotype of the blue flower?
BB
Bb
bb
In a certain plant, blue (B) flower color is dominant to white (b). You have a blue flowered plant and a white flowered plant. What is the genotype of the white flower?
BB
Bb
bb
In a certain plant, blue (B) flower color is dominant to white (b). You have a blue flowered plant and a white flowered plant. Now you cross the plants and all the offspring are blue. What are the genotypes for both parents? Choose 2 answers!
GG
Gg
gg
In pepper plants, green (G) fruit color is dominant to red (g) and round (R) fruit shape is dominant to square (r) fruit shape. These two genes are located on different chromosomes. What gamete types will be produced by a heterozygous green, round plant (GgRr)? Remember: Use F.O.I.L to determine the gamete types
GR
Gr
gR
gr
rr
In pepper plants, green (G) fruit color is dominant to red (g) and round (R) fruit shape is dominant to square (r) fruit shape. These two genes are located on different chromosomes. If two heterozygous plants are crossed (GgRr), what is the phenotypic ratio produced? First, figure out the parents genotypes. Figure out the gametes. Put gametes in punnett square
4:4:4:4
6:2:6:2
2:6:2:6
9:3:3:1
Hemophilia is a sex-linked trait where XH gives normal blood clotting and is dominant to the hemophilia allele Xh. A woman with normal blood clotting whose father had hemophilia and a normal man had children. What is the possibility that a mating between these two individuals will produce a child, regardless of sex, that has hemophilia?
25%
50%
75%
100%
