In guinea pigs, white coat (w) is recessive to black coat (W) and wavy hair (v) is recessive to straight hair (V). A breeder crosses a guinea pig that is homozygous for white coat and wavy hair with a guinea pig that is black with straight hair. The F, are then crossed with guinea pigs having white coats and wavy hair in a series of testcrosses. The following progeny are produced from these testcrosses: black, straight black, wavy 30 10 white, straight 12 white, wavy 31 Total 83

In guinea pigs, white coat (w) is recessive to black coat (W) and wavy hair (v) is recessive to straight hair (V). A breeder crosses a guinea pig that is homozygous for white coat and wavy hair with a guinea pig that is black with straight hair. The F, are then crossed with guinea pigs having white coats and wavy hair in a series of testcrosses. The following progeny are produced from these testcrosses: black, straight black, wavy 30 10 white, straight 12 white, wavy 31 Total 83

Name: If the genes are not assorting independently, what is the recombinatio
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Description: If the genes are not assorting independently, what is the recombinationfrequency between them? In guinea pigs, white coat (w) is recessive to black coat (W) and wavy hair(v) is recessive to straight hair (V). A breeder crosses a guinea pig that ishom

Biology (MindTap Course List)

11th Edition

ISBN:9781337392938

Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Chapter11: The Basic Principles Of Heredity

Section: Chapter Questions

Problem 11TYU: Individuals of genotype AaBb were mated to individuals of genotype aabb. One thousand offspring were...

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The following pedigree shows the pattern of inheritance of red-green color blindness in a family. Females are shown as circles and males as squares; the squares or circles of individuals affected by the trait are filled in black. What is the chance that a son of the third-generation female indicated by the arrow will be color blind if the father is not color blind? If he is color blind?
Individuals of genotype AaBb were mated to individuals of genotype aabb. One thousand offspring were counted, with the following results: 474 Aabb, 480 aaBb, 20 AaBb, and 26 aabb. What type of cross is it? Are these loci linked? What are the two parental classes and the two recombinant classes of offspring? What is the percentage of recombination between these two loci? How many map units apart are they?
In roses, purple flower color is determined by the dominant P allele, while pp homozygotes are white. The presence of long stems is determined by the dominant S allele, while ss homozygotes have short stems. Both mutations are completely penetrant. A test cross was performed between a rose plant of unknown genotype with a white flowered, short stemmed rose plant (pp ss) and the following 200 progeny plants were obtained: 84 white flowers, long stems 16 purple flowers, long stems 82 purple flowers, short stems 18 white flowers, short stems Select the statements below that are TRUE. Select 2 correct answer(s) The P and S genes independently assort during meiosis. The map distance between P and S is 17 CM. The genotype of the progeny plants with purple flowers and short stems is PP ss. The map distance between P and S is 83 CM. The homologs in the plant with unknown genotype are p S and Ps. The homologs in the plant with unknown genotype are PS and p s.
In roses, purple flower color is determined by the dominant P allele, while pphomozygotes are white. The presence of long stems is determined by the dominant S allele, while ss homozygotes have short stems. Both mutations are completely penetrant. A test cross was performed between a rose plant of unknown genotype with a white flowered, short stemmed rose plant (pp ss) and the following 200 progeny plants were obtained: 84 white flowers, long stems 16 purple flowers, long stems 82 purple flowers, short stems 18 white flowers, short stems Select two statements below that are TRUE. options: The P and S genes independently assort during meiosis. The map distance between P and S is 17 cM. The genotype of the progeny plants with purple flowers and short stems is PP ss. The map distance between P and S is 83 cM. The homologs in the plant with…
In dogs, dark coat color phenotype (D) is dominant over albino (a) and short hair (S) is dominant over long hair (1). Assume that these phenotypes are caused by two independently assorting genes and write as much as you can, the genotypes of the parents in the cross below. D, a, S and I represent phenotypes Y indicates the presence of progeny with this phenotype , whereas N indicates the absence of progeny with this phenotype PARENTS PHENOTYPES TYPES of PROGENY PHENOTYPE D,S D,I a,S a,l D,S X a,l Y Y
In dogs, dark coat color is dominant over albino, andshort hair is dominant over long hair. Assume that theseeffects are caused by two independently assorting genes.Seven crosses were done as shown below, in which D andA stand for the dark and albino phenotypes, respectively,and S and L stand for the short-hair and long-hairphenotypes.Number of progenyParental phenotypes D, S D, L A, S A, La. D, S × D, S 88 31 29 12b. D, S × D, L 19 18 0 0c. D, S × A, S 21 0 20 0d. A, S × A, S 0 0 29 9e. D, L × D, L 0 31 0 11f. D, S × D, S 45 16 0 0g. D, S × D, L 31 30 10 10Write the genotypes of the parents in each cross. Use thesymbols C and c for the dark and albino coat-color allelesand the symbols H and h for the short-hair and long-hairalleles, respectively. Assume parents are homozygousunless there is evidence otherwise.
In dogs, dark coat color phenotype (D) is dominant over albino (a) and short hair (S) is dominant over long hair (I). Assume that these phenotypes are caused by two independently assorting genes and write as much as you can, the genotypes of the parents in the cross below. D, a, S and I represent phenotypes Y indicates the presence of progeny with this phenotype, whereas N indicates the absence of progeny with this phenotype PARENTS PHENOTYPES TYPES of PROGENY PHENOTYPE D,S D,I a,S a,l D,S X a,l Y Y N
In tomatoes, dwarf (d) is recessive to tall (D) and opaque (light-green) leaves (op) are recessive to green leaves (Op). The loci that determine height and leaf color are linked and separated by a distance of 7 m.u. For each of the following crosses, determine the phenotypes and proportions of progeny produced.
In silk moths red eyes (r) and white banded wing (w) are recessive to normal eyes (R) and 10m.u. apar normal wings (W). A moth homozygous for red eyes and white banded wings is crossed with an individual who is homozygous normal for both traits. The F, progeny are testcrossed with the following progeny produced: Normal eyes, normal wings Red eyes, normal wings 19 Normal eyes, white banded wings Red eyes, white banded wings 426 a. What phenotypic proportions would be expected if the genes for red eyes and white banded wings were located on different chromosomes? b. What is the genetic distance between these two genes? 418 16
Deduce the phenotypic proportions in the progeny of thefollowing crosses of autotetraploids in which the a+/a locus is very close to the centromere. (Assume that the fourhomologous chromosomes of any one type pair randomly two by two and that only one copy of the a+ allele isnecessary for the wild-type phenotype.)a. a+/a+/a/a × a/a/a /ab. a+/a/a /a × a/a/a/ac. a+/a/a /a × a+/a/a /ad. a+/a+/a /a × a+/a/a /a
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A female hamster from a true-breeding big-eared strain was crossed to a male hamster from a true-breeding short-whiskered strain. Their offspring(F1) had normal ear size and whisker legnth. 1. One of the F1 males was crossed to a true-breeding big-eared, short-whiskered female. the following progeny were obtained. Are the loci regulating ear size and whisker lenght linked, and if so, what is the map distance between them? Normal ear, normal-whiskers 6 Big-eared, normal-whiskers 22 normal eared, short-whiskers 17 big-eared, shor-whiskers 5 2. Assume that the genes controlling ear size and whisker length are linked and have a map distance of 40cM. What would be the frequency of normal ear, short-whiskered hamsters among the progeny from a testcross of an F1 female? a. 0.4 b. 0.2 c. 0.3 d. 0.5 e. 0.1