
In cats, a condition known as Manx is a dominant disorder resulting in abnormal tail development....
Manx cats possess a heterozygous mutation resulting in a shortened or missing tail. If they receive 2 of these recessive alleles, it acts as a recessive lethal. Let’s say that this allele has a frequency of 0.15 in a population due to genetic drift in a small population. Based on natural selection, would you expect the allele frequency to change in the next 3 generations? Thoroughly explain your results.
The gene for manx tail in cats is an embryonic lethal in homozygous state, such that: MM = lethal (progeny not observed at birth) Mm = manx tail mm = normal tail Another trait in cats, the short hair (S) is dominant over long hair (s) so that: S_ = short hair ss = long hair The two traits are controlled by genes that assort independently. A) What is the genotypic and phenotypic distribution from an inter se mating? B)...
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...
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...
17. In a simple monohybrid cross the individuals of 100% known genotype in the F2 offspring, are which of these? a) the heterozygous individuals b) the homozygous dominant individuals c) the homozygous recessive individuals d) you could not determine the geneotype of any offspring without performing additional tests. 18. If an individual contains two alleles for a particular gene and the two alleles are different from each other, the individual is said to be: a) homozygous dominant b) homozygous recessive...
2o poihe Some cats have hairs in which there is more than one hair distributed along the hair shaft. This is known agouti. The agouti hairs are produced by protein which is coded for by the agouti gene. a. The agouti gene has two allles. The dominantallele codes for agouti hairs and the recessive allele codes for non-agouti hairs. State the phenotypes that are possible and the probability of having an offspring with each phenotype for a cross between a...
Let's say that in chipmunks, the allele for a black tail stripe (B) is dominant to the allele for a white tail stripe (b), and that the allele for patches of fur on an ear ("ear tufts") is determined by a recessive allele (e), with plain ears resulting from a dominant allele (E). A chipmunk that is homozygous recessive for the tail trait and heterozygous for ear morphology mates with a chipmunk that is heterozygous for both tail and ear...
Can you explain how to do number 4?
dominant individual and umail mmetance, hów can one differentiaté between a homozygous one who is heterozygous for the dominant trait? (A) By crossing the individuals in question (B) By crossing each individual with a known homozygous recessive and examining the offspring By crossing each individual with a known heterozygote and examining the offspring (C) (D Both B and C If a male hemophiliac (Xhy) is crossed with a female carrier of both...
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...
1) The alternate forms of a gene for the same trait are known as -A)alleles. B)phenotypes. C)genotypes. D)codominants. E)incomplete dominants. 2) Mendel carried out most of his research with A)livestock -B)pea plants. C)guinea pigs. D)fruit flies. E)bacteria. 3) Which of the following is true according to Mendel's law of segregation? A)Each individual contains two alleles for each trait. B)Fertilization restores the presence of two alleles. C)Alleles separate from each other during gamete formation. D)Each gamete contains one copy of each...