8. In gerbils, the gene that specifies coat color is sex-linked and has multiple alleles, as follows: B- black, br - brown, by - yellow, and b - albino. The allele br is incompletely dominant over by, the combination br by giving tan color; otherwise, dominance is in the order given -- B, br, by, b. (For your information, gerbils are mammals.) A black gerbil mated with a yellow gerbil gave one brown male and one black female offspring. a. What is the sex of the black parent? b. What is the genotype of the brown offspring? c. If the two offspring were to mate with each other, what is the probability that they will have a yellow offspring? d If the tue

8. In gerbils, the gene that specifies coat color is sex-linked and has multiple alleles, as follows: B- black, br - brown, by - yellow, and b - albino. The allele br is incompletely dominant over by, the combination br by giving tan color; otherwise, dominance is in the order given -- B, br, by, b. (For your information, gerbils are mammals.) A black gerbil mated with a yellow gerbil gave one brown male and one black female offspring. a. What is the sex of the black parent? b. What is the genotype of the brown offspring? c. If the two offspring were to mate with each other, what is the probability that they will have a yellow offspring? d If the tue

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Please help me, this is from practice, double check your answers, previous tutors got it wrong
Fruit flies with the genotypes XghXgh and Xg+h+Y are crossed. Note that two X-linked loci are being evaluated, and the presence of a + indicates a dominant allele. The heterogametic offspring will... 1.all express a dominant g phenotype and recessive h phenotype. 2. all express both dominant phenotypes. 3. all express both recessive phenotypes. 4. all express a recessive g phenotype and a dominant h phenotype.
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Fruit flies with the genotypes Xg+h+Xgh and XghY are crossed. Note that two X-linked loci are being evaluated, and the presence of a + indicates a dominant allele. The homogametic offspring will.... 1. express either the dominant or the recessive phenotypes for both g and h. 2. all express both dominant phenotypes. 3. express neither phenotype. 4. all express both recessive phenotypes.
2. In terms of pea plant height, tall plants (T) are dominant over dwarf plants (t). Purple flowers (P) are dominant over white flowers (p). Create a Punnett square that shows all of the possible offspring that could occur from breeding the following: a.) Plant 1: Heterozygous dominant for plant height, homozygous dominant for flower color b.) Plant 2: Heterozygous dominant for plant height, homozygous recessive for flower color c.) Include the percentage/ratio of occurrence for each phenotype.
17. Three recessive traits in aardwolf (a real animal) are stripe-less (s), dwarf (d), and fluffy mane (f). A stripe-less and fluffy female aardwolf mates with a dwarf male aardwolf to produce an F1 that is all WT (has stripes, normal size, and non-fluffy mane). When an F1 is test crossed to a fully recessive aardwolf, the following F2 are produced: Stripe-less, fluffy, normal sized 89 Striped, non-fluffy, dwarf 92 Stripe-less, non-fluffy, dwarf 1 Striped, fluffy, normal sized 2 11 13 19 20
7. In the guinea pig, one locus involved in the control of coat color may be occupied by any of four alleles: C (full color), ck (sepia), cd (cream), or c (albino), with an order of dominance of: C>ck > cd > c. In the following crosses, determine the parental genotypes and predict the phenotypic ratios that would result. a) Sepia x cream, where both guinea pigs had an albino parent b) Sepia x cream, where the sepia guinea pig had an albino parent and the cream guinea pig had two sepia parents c) Sepia x cream, where the sepia guinea pig had two full color parents and the cream guinea pig had two sepia parents d) Sepia x cream, where the sepia guinea pig had a full color parent and an albino parent and the cream guinea pig had two full color parents.