Homework Answers
Recombination
Recombination is the exchange of genetic material between different organisms which leads to production of offspring with combinations of traits that differ from those found in either parent.
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Consider the set of crosses for hypothetical genes that control eye color and tail length in...
The genes for fin length and color are so far apart on the same chromosome that...
The genes for fin length and color are so far apart on the same chromosome that an excess of recombinant progeny was observed. Question 4 16.5 pts In the goldfish, the allele for dark color (C) is dominant to that for albino (c) and the allele for long fins (L) is dominant to the allele for short fins (1). A dark, long-finned goldfish is crossed to an albino, short-finned goldfish and the following phenotypes are observed in the progeny: Phenotype...
The genes for sepia eye color, short bristles, and dark body coloration are on the same...
The genes for sepia eye color, short bristles, and dark body coloration are on the same chromosome of Drosophila melanogaster. Each gene has two alleles: wild type, which is dominant, or mutant, which is recessive. se+ is dominant and causes red eyes; se is recessive and causes sepia eyes sb+ is dominant and causes long bristles; sb is recessive and causes short bristles b+ is dominant and causes gray body coloration; b is recessive and causes dark...
Answer Choices: A) No B) More information is needed to determine eye color C) Yes Required...
Answer Choices:
A) No
B) More information is needed to determine eye color
C) Yes
Required information Fruit flies normally have red eyes. Seven different true-breeding strains of fly with white eyes have been identified (A-G). In each strain, the white eye trait is due to an autosomal recessive allele. It is possible all seven strains have mutations in the same gene. Alternatively, they may have mutations in different genes. To determine how many genes are involved in eye color...
Uption 4. The inheritance of hair and eye color is very complicated. Scientists have found approximately...
Uption 4. The inheritance of hair and eye color is very complicated. Scientists have found approximately 10-20 genes responsible for determining hair and eye color in humans (sheesh - I thought a dihybrid cross with 2 genes was bad...). Although many genes are involved in producing these phenotypes, it does seem that just a few genes play a major role in determining the color of our hair and eyes. The following is a simplified, but still somewhat realistic view of...
In Genetics lab, you decide to further investigate Drosophila eye color. In addition to studying the...
In Genetics lab, you decide to further investigate Drosophila eye color. In addition to studying the sepia gene (se), you decide to study the gene mahogany eyes (mo). Flies that are mo-/mo- have brown eyes. You wonder if a fly that is a double mutant for sepia and mahogany eyes would have very dark brown (almost black) eyes. Because se and mo are both on the third chromosome, you have to do a recombination. You look through a former labmate’s...
3. Consider two traits for a hypothetical animal fur color and ear length. Each trait is...
3. Consider two traits for a hypothetical animal fur color and ear length. Each trait is controlled by one gene with two alleles. Black fur is dominant to gray fur and long ears are dominant to short. The genes for the two traits are located on different chromosomes. Note: In the following problems, you need to take both traits into account simultaneously a. You cross a true breeding black long-eared male with a true-breeding gray short-eared female. What is the...
Assume that tail length in mice is a quantitative trait involving two genes, each with 2...
Assume that tail length in mice is a quantitative trait involving two genes, each with 2 alleles. One allele at each gene contributes to long tails, the other allele at each gene does not (small tails). The genes are located on different autosomes. Mice with 0 contributing alleles have tails that are 4 cm in length; mice with tails with 4 contributing alleles are 12 cm in length. Determine the phenotypic ratio from an F2 from a true breeding parent...
In a species of carrots, two genes control a couple of desirable traits. The Y/y gene...
In a species of carrots, two genes control a couple of desirable traits. The Y/y gene controls carrot color, where the “Y” allele that makes yellow carrots is dominant over the “y” allele which makes plain-old orange carrots. Additionally, the L/l gene controls carrot length, where the “L” allele that produces long carrots is dominant over the “l” allele which produces short carrots. A. A carrot farmer performs a dihybrid cross with two true-breeding species of carrots. The first carrot...
2. In certain cats, tail length-long, short, manx (no tail) - is determined by a gene...
2. In certain cats, tail length-long, short, manx (no tail) - is determined by a gene that demonstrates incomplete dominance. a. Make up letters to represent the long & manx alleles. b. Give the genotypes for each tail type. Long-tailed Short-tailed Manx c. Construct a Punnett square to illustrate a cross between a short-tailed cat and a man. What is the probability that the resulting kittens will be manx? Activity 3: Codominance 1. In codominance, the symbols for alleles are...
explain In flying pigs, genes for wing length (S = long wings, s = short wings)...
explain
In flying pigs, genes for wing length (S = long wings, s = short wings) and body color (P=gray; p = pink) are 24 map units apart. You are crossing a dihybrid male pig (created by crossing a pure-breeding short-winged gray pig with a pure-breeding long-winged pink pig) with a pink, short-winged female pig. For the questions that follow, where appropriate, do not do the math -- report individual chances and mathematical operators. Are the male pigs alleles in...
The genes for fin length and color are so far apart on the same chromosome that an excess of recombinant progeny was observed. Question 4 16.5 pts In the goldfish, the allele for dark color (C) is dominant to that for albino (c) and the allele for long fins (L) is dominant to the allele for short fins (1). A dark, long-finned goldfish is crossed to an albino, short-finned goldfish and the following phenotypes are observed in the progeny: Phenotype...
Answer Choices:
A) No
B) More information is needed to determine eye color
C) Yes
Required information Fruit flies normally have red eyes. Seven different true-breeding strains of fly with white eyes have been identified (A-G). In each strain, the white eye trait is due to an autosomal recessive allele. It is possible all seven strains have mutations in the same gene. Alternatively, they may have mutations in different genes. To determine how many genes are involved in eye color...
Uption 4. The inheritance of hair and eye color is very complicated. Scientists have found approximately 10-20 genes responsible for determining hair and eye color in humans (sheesh - I thought a dihybrid cross with 2 genes was bad...). Although many genes are involved in producing these phenotypes, it does seem that just a few genes play a major role in determining the color of our hair and eyes. The following is a simplified, but still somewhat realistic view of...
3. Consider two traits for a hypothetical animal fur color and ear length. Each trait is controlled by one gene with two alleles. Black fur is dominant to gray fur and long ears are dominant to short. The genes for the two traits are located on different chromosomes. Note: In the following problems, you need to take both traits into account simultaneously a. You cross a true breeding black long-eared male with a true-breeding gray short-eared female. What is the...
2. In certain cats, tail length-long, short, manx (no tail) - is determined by a gene that demonstrates incomplete dominance. a. Make up letters to represent the long & manx alleles. b. Give the genotypes for each tail type. Long-tailed Short-tailed Manx c. Construct a Punnett square to illustrate a cross between a short-tailed cat and a man. What is the probability that the resulting kittens will be manx? Activity 3: Codominance 1. In codominance, the symbols for alleles are...
explain
In flying pigs, genes for wing length (S = long wings, s = short wings) and body color (P=gray; p = pink) are 24 map units apart. You are crossing a dihybrid male pig (created by crossing a pure-breeding short-winged gray pig with a pure-breeding long-winged pink pig) with a pink, short-winged female pig. For the questions that follow, where appropriate, do not do the math -- report individual chances and mathematical operators. Are the male pigs alleles in...
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