Homework Answers
The dihybrid cross for the given alleles would be as follows:
a) The phenotype and frequency for each of the given outcomes would be
M_D_ - Frequency would be 9 out of 16 and phenotype would be cat with a black fur because M_ codes for black pigment
M_dd - Frequency would be 3 out of 16 and phenotype would be cat with light gray fur because the presence of homozygous dd masks the phenotype of M/m and results in a light gray fur
mmD- - Frequency would be 3 out of 16 and phenotype would be cat with a black fur because mm codes for brown pigment
mmdd - Frequency would be 3 out of 16 and phenotype would be cat with light gray fur
b) The phenotype ratio would be
9:3:4 (Black: brown:light gray)
c) This is recessive epistasis because in this case the recessive homozygous alleles dd are masking the phenotype of dominant allele M_
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WORD BANK: Complementary gene interaction, Duplicate gene action, Dominant gene interaction, Recessive epistasis, Dominant epistasis, Dominant...
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Match the following terms with the appropriate description below: a. alleles b. autosomes c. dominant allele...
Match the following terms with the appropriate description
below:
a. alleles b. autosomes c. dominant allele d. genotype e.
heterozygous f. homozygote g. phenotype h. recessive allele i. sex
chromosomes
1. ________________ genetic make-up
2. ________________ how genetic make-up is expressed
3. ________________ chromosomes that dictate most body
characteristics
4. ________________ alternative forms of the same gene
5. ___________an individual bearing two alleles that are the same
for a particular trait 6. ________________ an allele that is
expressed, whether in...
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punnet square questions
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6. In tigers, a dominant allele (W) is responsible for the expression of the normal orange pigment. Individuals that inherit twe recessive alleles (w) lack the normal orange pigment in their fur, appearing white with black stripes. A pair of normally colored parewis produces a cub that is white with black stripes and scab that is orange with black stripes. What are the possible genotypes of the cube? b. What are the possible genotypes of the parents? 6. Explain your...
INTERACTIVE QUESTION 14.6 Consider an example in which the Mim gene (for pig- ment production) is epistatic to the B/b gene (for deposi- tion of pigment). Suppose that a dominant allele M is necessary for the production of the black pigment mela- nin; mm individuals are white. A dominant allele B re- sults in the deposition of a lot of pigment in an animal's hair, producing a black color. The genotype bb produces Phenotype Genotype Ratio Black M_bb I SS...
that's all the professor give
3. In pigs, black hair (B) is dominant to red hair (b). Erect ears (E) are dominant to drooping ears (e). What are the expected proportions of the different phenotypes resulting from a mating between two pigs heterozygous for both traits? SHOW A PUNNETT SQUARE 4. There are 2 colors in color squash, white & yellow. White (W) is dominant over yellow (w). What are the expected genotype and phenotype frequencies for each of the...
1. Animals can teach us genetics. Match Codominance Show a dominant and recessive relationship _An allelic series A dominant homozygote is lethal Coat coloration is determined by 2 genes Shows variable expressivity A qualitative, or continuous, trait involving polygenes Females mosaics for X-linked heterozygous color genes A. Manx cat B. Coat coloration rabbits C. Labrador retriever dogs D. Piebald spotting in beagles E. A and B blood alleles F. A and O blood alleles G. Calico cat H. Height of...
Match the following terms with the appropriate description
below:
a. alleles b. autosomes c. dominant allele d. genotype e.
heterozygous f. homozygote g. phenotype h. recessive allele i. sex
chromosomes
1. ________________ genetic make-up
2. ________________ how genetic make-up is expressed
3. ________________ chromosomes that dictate most body
characteristics
4. ________________ alternative forms of the same gene
5. ___________an individual bearing two alleles that are the same
for a particular trait 6. ________________ an allele that is
expressed, whether in...
Chapter Review 1. The gene for redness is dominant to the gene for whiteness. If a true-breeding plant with red flowers is crossed with a true breeding plant with white flowers, their offspring will be A. red and true-breeding C white and true-breeding B. red hybrids D. pink 2. Thllness is dominant to dwarfism in pea plants. Which one of the following alternatives describes the offspring produced by two heterozygous pea plants? A 75% tall and 25% dwarf plants C....
Let's say you have a pea plant that has the dominant traits for Tall stalks and Yellow seeds (TY). You want to know if this plant is homozygous for these traits, or heterozygous. What would you cross it with, and what is this called? A Monohybrid cross: TY X TY a plant with the same phenotype B. Dihybrid cross: a plant with a different trait (pink flowers and tall stalks) C. Test-cross; a plant homozygous for the recessive alleles: short...
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2. At a separate locus, cats have a gene that controls how densely the melanin is deposited e hair. The dense (D) deposit results in black or brown cats and is dominant to the dilute version. Dilute black cats are gray (technically it called blue) and dilute brown cats are a light brown called lilac. Romeo and Juliet are both heterozygous for both loci. Ose Punnett squares and probability rules to solve the following. Draw the Punnett...
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