1.My wife has black color eyes, the dominant trait. All of her family and relatives have...
1.My wife has black color eyes, the dominant trait. All of her family and
relatives have dark eyes too. I have light color eyes (blue), the recessive
trait. We are hoping for a blue-eyed baby. What is the probability we will
have a baby with blue eyes? What is the probability we will have a baby
with dark eyes?
2. In humans, tongue rolling is a dominant trait, those with the recessive
condition cannot roll their tongues. Bob can roll his tongue, but his mother
could not. He is married to Sally, who cannot roll her tongue. What is the
probability that their child
ren
will not be able to roll tongue?
3.In goats, a recessive gene causes the goats to "faint" when they are
startled. A farmer breeds two goats (that have never fainted) and their first
offspring faints two days after its birth. What must the parent's genotypes
have been? Show the cross that resulted in this offspring.
4.In mice, the ability to run normally is a dominant trait. Mice with this trait
are called running mice (R). The recessive trait causes mice to run in circles
only. Mice with this trait are called waltzing mice (r). Hair color is also
inherited in mice. Black hair (B) is dominant over brown hair (b). For each of
the following problems, determine the parent genotypes, determine
possible gametes then construct a Punnett square to solve.
a. Cross a homozygous running, heterozygous black mouse with a
waltzing brown mouse
Parental genotypes
Possible gametes
Offspring phenotypic ratio
b. Cross a heterozygous running, brown mouse with a heterozygous
running, homozygous black mouse
Parental genotypes
Possible gametes
Offspring phenotypic ratio
Co-Dominance Problems
In some chickens, the gene for feather color is controlled by codominance.
The allele for black is B and the allele for white is W. The heterozygous
phenotype is known as Erminette (black and white spotted).
What is the genotype for black chickens? ____
What is the genotype for white chickens? ____
What is the genotype for erminette chickens? ____
a. If erminette chickens were crossed with black chicken what is the
probability that:
They will have black chickens
They will have white chickens
They would have erminette chickens
b. Erminette chicken and a white chicken are crossed.
What is the probability that:
They will have erminette chickens
They will have black chickens
They will have white chickens
Incomplete Dominance Problems
In Andalusian fowls, black individuals (BB) and white individuals (B’B’) are
homozygous. A homozygous black bird is crossed with a homozygous white
bird. The offspring are all gray.
a) Show the cross as well as the genotypes and phenotypes of the
parents and offspring.
b) What results if a black individual is crossed with a gray individual?
c) What results if a white individual is crossed with a gray individual?
d) If two gray individuals were crossed, what would be the ratios for
both phenotype and genotype of the offspring?
(please i need all the answers)
Homework Answers
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1.My wife has black color eyes, the dominant trait. All of her
family and
relatives have...
7) In humans, brown eyes (B) are a simple dominant trait over blue eyes (b). What...
7) In humans, brown eyes (B) are a simple dominant trait over blue eyes (b). What is the genotype of a brown-eyed woman who has a blue-eyed child? A)bb -B)Bb С)ВВ D)BBB E) BbBb 8) The ability to roll the edges of the tongue upward in a U-shape is inherited as a dominant allele at a single gene locus, Which of the following genotypes would produce an individual that can roll their tongue? A)TT only B)Tt only C) only D)TT...
One-Gene Crosses 1. In Drosophila, gray body color is dominant over black body color. By crossing...
One-Gene Crosses 1. In Drosophila, gray body color is dominant over black body color. By crossing a heterozygous gray-bodied fly with a black-bodied fly, one hundred offspring resulted. How many would be expected to have black bodies? 7 2. Albinism, the lack of pigment, occurs commonly in animals and is always recessive to normal pigmentation. Ten brown and eight albino mice were born to parents which were likewise brown and albino. What are the genotypes of both parents? 3. The...
1. In the P generation, whena homozygous dominant trait is crossed with a homozygous recessive trait,...
1. In the P generation, whena homozygous dominant trait is crossed with a homozygous recessive trait, all the Figeneration will show the dominant trait. What will be the genotype and phenotype ratio in the F2 generation when the Fi generation is crossed? 2 In humans, brown eyes (B) are dominant over blue (b). A brown-eyed man marries a blue-eyed woman and they have three children; two of the children have brown eyes and one has blue eyes. Draw the Punnett...
coat color is due to a dominant allele (W), black coat color to its recessive allele...
coat color is due to a dominant allele (W), black coat color to its recessive allele unnett squares for each of the following crosses and answer the questions. 2. In sheep, white tw). Construct P d frequency fo a. A black sheep crossed to a black sheep. List the genotypes, phenotypes, an each of the offspring b. A white sheep, the product of a black x white cross, is crossed with a black sheep. List the genotypes, phenotypes, and frequency...
2. The lubber grasshopper is a very large grasshopper, and is black with red and yellow...
2. The lubber grasshopper is a very large grasshopper, and is black with red and yellow stripes. Assume that red stripes are expressed from the homozygous RR genotype, yellow stripes from the homozygous rr genotype, and both from the heterozygous genotype. A. If two heterozygous grasshoppers were crossed, what would be the genotypic ratio of the F1 generation (RR:Rr:rr)? Fill in the Punnett square. B. What genotypes would be produced by crossing a grasshopper with both color stripes and one...
In mouse coat color, the allele G (for gray color) is dominant to black, which occurs...
In mouse coat color, the allele G (for gray color) is dominant to black, which occurs only with the double recessive gg. A recessive mutation homozygous at another site, kk, gives albino mice regardless of the G/g genotype. Allele K allows expression at the G/g locus. The F1 cross are all GgKk and are gray in color. Do the F2 cross and indicate the phenotype ratios.
Question 3 1 pts The color of chickens is determined by gene B, such that BB=black,...
Question 3 1 pts The color of chickens is determined by gene B, such that BB=black, Bb = gray, and bb = white. A second gene R controls comb shape, with dominant rose and recessive single comb. If a white single-combed chicken is mated with a gray chicken that is heterozygous for rose comb, what fraction of the offspring will be gray with rose comb? 1/4 9/16 1/8 O 3/8 1/16
5. Tongue rolling is dominant. Bo her tongue. What are the genotypes children will be tongue...
5. Tongue rolling is dominant. Bo her tongue. What are the genotypes children will be tongue rollers? D s dominant. Bob can roll his tongue, but his mother cannot. Bobs wife B 1 TBP his mother cannot. Bobs wife cannot roll om, and Bobs Wife? What proportion of Bob's Il be tongue rollers? Draw a Punnentt square to show your work. Bob's Mom Bob Bob's Wife Bob's Wife 6. In hamsters, black coat (B) is dominant to white coat color...
In horses, the color black is due to a dominant allele (B) and chestnut color is...
In horses, the color black is due to a dominant allele (B) and chestnut color is due to a recessive allele (b) of the same gene. The trotting gate is due to a dominant allele (T) and the pacing gate is due to the recessive allele (t) of the same gene. These two genes are located on different chromosomes. A homozygous black pacer horse mates with a homozygous, chestnut trotting horse and they have a daughter. a. What are the...
is In guinea pigs, black coat color (B) is dominant to white (b), and rough color...
is In guinea pigs, black coat color (B) is dominant to white (b), and rough color (R) dominant to smooth (o). What following crosses a) BBRR x bbrr b) BBrr x bbRR c) Bbrr x bbRr d) BBRr x BbRr e) BbRr x BbRr 2)The presence of one of the Rh antigens on the surface of the red blood cells (Rh+) in humans is produced by a dominant gene R. Th negative cells are produced by the recessive genotype rr....
7) In humans, brown eyes (B) are a simple dominant trait over blue eyes (b). What is the genotype of a brown-eyed woman who has a blue-eyed child? A)bb -B)Bb С)ВВ D)BBB E) BbBb 8) The ability to roll the edges of the tongue upward in a U-shape is inherited as a dominant allele at a single gene locus, Which of the following genotypes would produce an individual that can roll their tongue? A)TT only B)Tt only C) only D)TT...
One-Gene Crosses 1. In Drosophila, gray body color is dominant over black body color. By crossing a heterozygous gray-bodied fly with a black-bodied fly, one hundred offspring resulted. How many would be expected to have black bodies? 7 2. Albinism, the lack of pigment, occurs commonly in animals and is always recessive to normal pigmentation. Ten brown and eight albino mice were born to parents which were likewise brown and albino. What are the genotypes of both parents? 3. The...
coat color is due to a dominant allele (W), black coat color to its recessive allele unnett squares for each of the following crosses and answer the questions. 2. In sheep, white tw). Construct P d frequency fo a. A black sheep crossed to a black sheep. List the genotypes, phenotypes, an each of the offspring b. A white sheep, the product of a black x white cross, is crossed with a black sheep. List the genotypes, phenotypes, and frequency...
2. The lubber grasshopper is a very large grasshopper, and is black with red and yellow stripes. Assume that red stripes are expressed from the homozygous RR genotype, yellow stripes from the homozygous rr genotype, and both from the heterozygous genotype. A. If two heterozygous grasshoppers were crossed, what would be the genotypic ratio of the F1 generation (RR:Rr:rr)? Fill in the Punnett square. B. What genotypes would be produced by crossing a grasshopper with both color stripes and one...
Question 3 1 pts The color of chickens is determined by gene B, such that BB=black, Bb = gray, and bb = white. A second gene R controls comb shape, with dominant rose and recessive single comb. If a white single-combed chicken is mated with a gray chicken that is heterozygous for rose comb, what fraction of the offspring will be gray with rose comb? 1/4 9/16 1/8 O 3/8 1/16
5. Tongue rolling is dominant. Bo her tongue. What are the genotypes children will be tongue rollers? D s dominant. Bob can roll his tongue, but his mother cannot. Bobs wife B 1 TBP his mother cannot. Bobs wife cannot roll om, and Bobs Wife? What proportion of Bob's Il be tongue rollers? Draw a Punnentt square to show your work. Bob's Mom Bob Bob's Wife Bob's Wife 6. In hamsters, black coat (B) is dominant to white coat color...
is In guinea pigs, black coat color (B) is dominant to white (b), and rough color (R) dominant to smooth (o). What following crosses a) BBRR x bbrr b) BBrr x bbRR c) Bbrr x bbRr d) BBRr x BbRr e) BbRr x BbRr 2)The presence of one of the Rh antigens on the surface of the red blood cells (Rh+) in humans is produced by a dominant gene R. Th negative cells are produced by the recessive genotype rr....
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