Suppose the tail length of two populations of lizards is controlled by one gene. To determine the mode of inheritance, a true-breeding short-tailed female is crossed with a true-breeding long-tailed male. Then, siblings from the F1 are crossed and the number of short- and long-tailed animals are counted to determine the phenotype ratio. 1. What phenotypic ratio do you expect in the F2 generation if tail length is controlled by an autosomal gene, and long tails are dominant to short tails? 1 long: 1 short males 1 long: 1 short, females all short O 3 long: 1 short 1 long: 3 short 2. What phenotypic ratio do you expect in the F2 generation if tail length is controlled by a sex- linked gene, and long tails are dominant to short tails? Assume a chromosomal sex determination system as in mammals, with XX females and XY males. O 1 long: 3 short O males 1 long: 1 short, females all short O 1 long: 1 short 3 long: 1 short

Suppose the tail length of two populations of lizards is controlled by one gene. To determine the mode of inheritance, a true-breeding short-tailed female is crossed with a true-breeding long-tailed male. Then, siblings from the F1 are crossed and the number of short- and long-tailed animals are counted to determine the phenotype ratio. 1. What phenotypic ratio do you expect in the F2 generation if tail length is controlled by an autosomal gene, and long tails are dominant to short tails? 1 long: 1 short males 1 long: 1 short, females all short O 3 long: 1 short 1 long: 3 short 2. What phenotypic ratio do you expect in the F2 generation if tail length is controlled by a sex- linked gene, and long tails are dominant to short tails? Assume a chromosomal sex determination system as in mammals, with XX females and XY males. O 1 long: 3 short O males 1 long: 1 short, females all short O 1 long: 1 short 3 long: 1 short

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,...

See similar textbooks

Similar questions

The pedigree above shows inheritance of inability to taste PTC (shaded individuals cannot taste it), which is caused by mutation in a single gene. What is the probability that III-3 and III-4 will have a child who is heterozygous? 1 1/3 1/9 4/9 1/4 3/4 1/2 2/3 1/16
. In fruit flies, brick-red eye color is dominant to a bright orange color called cinnabar. A fruit fly with heterozygous eye color geno- type is crossed with homozygous recessive fruit fly. What is the probability of inheritance for the cinnabar phenotype and the heterozygous genotype? A. Cinnabar phenotype = 1.0; Heterozygous genotype = 0 Cinnabar phenotype = 0; Heterozygous genotype = 1.0 C. Cinnabar phenotype = 0.5; Heterozygous genotype = 0.5 D. Cinnabar phenotype = 0.25; Heterozygous genotype = 0.5 E. Cinnabar phenotype = 0.5; Heterozygous genotype = 0.75 В.
What genotype and phenotype ratios would you expect if you crossed a pure breeding gray mouse with a heterozygous mouse?
The snapdragon flower in Tennessee and Alabama are both white. When these two strains of snapdragon were crossed, the resulting F1 produces purple-color flower. When the F1 was self-crossed, the F2 progeny were 540 purple and 420 white. 16. What kind of inheritance pattern is this? A. recessive epistasis B. complete dominance C. dominant epistasis D. codominance E. complementation
Suppose a student performs a three-point test cross with mice involving mouse genes T, V and D. If the most abundant classes of progeny are TvD and tVd and the rarest classes are tvd and TVD which gene is in the middle and what is the genotype of each mouse involved in the cross?
Suppose a woman who is a carrier (XNXN)marries a man who is colorblind (XnY). Is there any chance that they will have a male child with a normal color vision? What are the possible phenotypes? 大 A. No chance, 2 female carrier and 2 males colorblind B. Yes, 1 female carrier, 1 female color blind, 1 male with normal color vision and 1 male colorblind C. Yes, 1 female colorblind and 2 males with normal vision and 1 male colorblind D. Yes, 2 males with normal color vision and 2 females carrier
Consider a cross between a Brown furred dog and a Yellow furred dog. All the puppies born from these parents are yellow furred. Crossing the F1 yellow furred sons and F1 yellow furred daughters produces a 3:1 ratio of yellow furred dogs (3) to brown-furred dogs (1) in the F2 generation. True or False: this tells you that brown fur color in this dog species is inherited in an autosomal recessive manner. is it true or false?
Carrion beetles lay their eggs in dead animals and then bury them in the ground until they hatch. Assume that the preference for fresh meat (F) is dominant to the preference for rotted meat and that the tendency to bury the meat shallow (S) is dominant to the tendency to bury the meat deep. Suppose a female carrion beetle homozygous dominant for both traits mates with a male homozygous recessive for both traits. 1) What will the F1 genotypic ratio be? 2) What are the chances of obtaining a beetle that is heterozygous for both traits?
D In fava bean plant the seed color can be coded by two alleles, green (G) which is dominant and purple (g) which is recessive. A gardening hobbyist performed a cross between 2 true-breeding lines P1 and P2 that respectively have green and purple seeds. Answer the following questions in regard to the hobbyist experiment. 1) What are the genotypes of the parental lines A and B? what are the genotypes of the gametes of each parent? 2)What is the phenotype and genotype of the F1 generation of the cross? 3) What are the proportions of the genotypes of the F2 generation? 4)What are the proportions of the phenotypes of the F2 generation?
In pea plants, spherical seeds (S) are dominant to dented seeds (s). In a genetic cross of twoplants that are heterozygous for the seed shape trait,i. Explain the diagram ii. What fraction of the offspring should have spherical seeds? iii. Use punnett square to show your answer. iv. Interpret the results of a Punnett square
Fur color is codominant in cows. A roan cow has a fur color of orange and white. What are the phenotype and genotypic ratios expected if a roan male and a roan female breed together?
You are studying 2 traits, fur color and length, in rabbits. You cross a true-breeding brown, short furred rabbit with a true-breeding white, long furred rabbit. The F1 offspring are all white, short furred rabbits. You then cross an F1 offspring to a rabbit homozygous recessive for both traits. Assuming that fur color and fur length are independently assorting, what phenotypic ratio would you expect to see in the F2 generation? white, short: white, long: brown, short: brown, long