In dogs, the gene for fur color has two alleles. The dominant allele (F) codes for GREY fur. The recessive allele (f) codes for black fur. 1) Create a Punnett square for the crossing of a Heterozygous male dog and a female dog with black fur. 2) What is the probability that the offspring will have black fur? Grey fur?

In African clawed toads, albino skin (a) is recessive to green skin (A). Two toads are mated. One of the parents has green skin and one has albino skin. Among the resulting offspring are twenty albinos and eighteen greens. (Show your work below!) (a) What is the genotype of the green parent? (b) What is the genotype of the albino parent? (c) What are the genotypes of the offspring? Greens Albinos (d) Did segregation of alleles occur? (e) Did independent assortment of alleles occur? (f) Explain your answers. (g) Which of Mendel’s Laws is demonstrated by this example?

You cross true breeding blue and red morning glories and get all blue offspring. a) Based on this information alone: i) How many loci are involved in the expression of this trait? How many alleles? What are the dominant and recessive interactions between the alleles at the locus/loci? ii)what are the possible genotypes of the parents and F1s? iii) Based on your hypothesized genotypes from ii, what do you expect the outcome of a cross between the F1's to be? (i.e. what phenotypes in what ratios?)     b) You then cross the F1 individuals and you obtain the following results Blue - 200 purple - 126 red - 24 i) Are these results statistically consistent with your hypothesis above? (prove it!) ii) If not, what is an alternative hypothesis that might explain these results? Are these results the result of one locus or 2? Test your new hypothesis using chi-squared test. Discuss the meaning of your results. (Note: If your hypothesis proves wrong, that is OK!!! But you have to be able to discuss…

In cats, coat color is an X-linked trait with incomplete dominance, Yellow coat is caused by the allele XT and black coat by the allele X, A tortoise is caused by the heterozygous condition. What is the correct way to represent the genotype of a cat with a tortoise coat? O XIT), XIt) O XIT), Y O XIT, YIt) O XIt), X(t) (WX O 0.25 Question 7 In cats, coat color is an X-linked trait with incomplete dominance. Yellow coat is caused by the allele XT and black coat by the allele X. A tortoise cc is caused by the heterozygous condition. What is the correct way to represent the genotype of a male cat with a black coat? O X(t) Y O XIT) Y O X(t) X(t) O X(t) Y() *ロー #3 %24 & L. E R D G K L レ prt sc alt alt く ト

In humans, the recessive allele that causes a form of red-green colour blindness (c) is found on the X chromosome. a.) Determine the genotypes and phenotypes of the F1 generation from a colour-blind father and a mother who is homozygous for normal colour vision. b.) Determine the genotypes and phenotypes of the F1 generation from a father who has normal colour vision and a mother who is heterozygous for colour vision. c.) Draw a Punnett square to determine the genotypes of parents that could produce a daughter who is colour-blind

6) Duchenne muscular dystrophy (DMD) is a muscle wasting disease and is an X-linked recessive disorder. A man with this disease has children with a woman who does not have the disease, but her father did. If they had a ason, what would be the chance that he would have DMD? If they had a daughter? Any child? Construct a Punnett square to determine the answers. 10) In cats, coat color is completely dominant to albino (Mendelian genetics) and is an autosomal trait. Playa is a female albino cat and is crossed with Azul, a black-coated male. In their first litter, they have 4 black kittens and 2 albino kittens. If in the second litter, they have 8 kittens, how many of the kittens are expected to be albino? Construct a Punnett Square to determine the answer.

Write the cross using correct symbols. What kind of cross is this called?

7) Three years later, one of Rocky's and Ruby's sons, who is heterozygous for his curly fur, meets another dog that is also heterozygous for her curly fur. Create a Punnett square to show the possibilities that would result if they had puppies. (4) a) Fill in the Punnett square, then list the possible genotypes and phenotypes for the puppies. b) What are the chances of a puppy with curly fur? out of c) What are the chances of a puppy with straight fur? out of BLOMU CAGA (C 3LS gousur co BeGAGE (p) BROM ncrinoh (e) etone 2po BLOM

In humans, one type of red-green colorblindness (n) is sex-linked and recessive. A) A woman who is a carrier marries a man with normal vision. What is the chance of having color-blind daughters? Color-blind sons? B) A heterozygous woman and a color-blind man marry. What is the chance of having color-blind daughters? Color-blind sons?

2). In rabbits, coat colour patterns are determined by 3 alleles at one locus. Agouti is dominant over Himalayan and both are dominant over albino. Give all the possible genotypes of a) agouti rabbits b) himalyan rabbits c) albino rabbits