Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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A heterozygous round seeded plant (Rr) is crossed with a homozygous round seeded plant (RR).
What percentage of the offspring will be homozygous (RR)? _
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- Forked bristles, miniature wings, and sable bodies are all homozygous recessive traits whose genes are located on the same chromosome. You cross female flies that have forked bristles (f) with male flies that have both miniature wings (m) and sable bodies (s). You then cross the F1 of this cross with flies that have sable bodies, forked bristles, and miniature wings, and obtain the following numbers of offspring with the following phenotypes out of a total of 1500 offspring: Sable bodies and miniature wings 463 Sable bodies and forked bristles 3 Miniature wings and forked bristles 49 Forked bristles, miniature wings, sable bodies 99 Miniature wings 5 Wild type 107 Sable bodies 55 Forked bristles…arrow_forwardIn a certain type of pea plant, the gene for yellow color (Y) is dominant to the gene for green color (y), and the gene for round shape (R) is dominant to the gene for wrinkled shape (r). If a homozygous dominant plant is mated with a homozygous recessive plant (P-gen), what proportion in the F2 generation will be homozygous recessive? a) 1/4 b) 1/16 c) 3/4 d) 3/8arrow_forwardIn crosses between mutant mice, you find the following patterns in the genotype for the A locus containing alleles A1, A2, A3 and A4: What would be the best explanation for the inheritance and why?arrow_forward
- Nonearrow_forwardThe phenotype of crooked wings (cw) in Drosophila melanogaster is caused by a recessive mutant gene that independently assorts with a recessive mutant gene for hairy (h) body. Assume that a cross is made between a fly with normal wings and a hairy body and a fly with crooked wings and normal body hair. All F1 flies from this cross were wild-type, and these flies were crossed among each other to produce 288 F2 offspring. Which phenotypes would you expect among the offspring in the F2 generation, and how many of each phenotype would you expect?arrow_forwardIn fruit flies, the following X-linked traits are found: white eyes are recessive to red eyes, ebony body is recessive to gray body, and short wings is recessive to long wings. A cross was made between wild-type males with red eyes, long wings, and gray bodies and females with white eyes, short wings, and ebony bodies. Female heterozygote resulting from this cross, which had red eyes, long wings, and gray bodies, were then crossed with males with white eyes, short wings, and ebony bodies. The F2 generation data is obtained below: 1299 white eyes, short wings, ebony bodies 1367 red eyes, long wings, gray bodies 99 white eyes, short wings, gray body 89 red eyes, long wings, ebony bodies 49 white eyes, long wings, ebony bodies 49 red eyes, short wings, gray bodies 1 red eyes, short wings, ebony bodies 1 white eyes, long wings, gray bodies A) Calculate the map distance separating the three genes B) Which gene is in the middle?arrow_forward
- COU f) What kind of offspring can be produced if a red-flowered plant is crossed with a pink-flowered plant? Show your work. g) What kind of offspring is/are produced if a pink-flowered plant is crossed with a white-flowered plant? Show your work. hleodarrow_forwardCross a heterozygous dominant purple flowered plant to a recessive white flowered plant. What is (are) the phenotypes of the F1? And what is the phenotypic ratio?arrow_forwardDo number 3 pleasearrow_forward
- In garden peas, yellow seeds (Y)(Y) are dominant to green seeds (y)(y), and inflated pods (I)(I) are dominant to constricted pods (i)(i). Suppose you have crossed YYIIYYII parents with yyiiyyii parents. What would be all the genotype(s) of gametes produced by F1F1 individuals?arrow_forwardIn tomatoes, regular leaves (L) are multilobed and serrated and potato leaves (l) are broad, smooth, and single (Image 1). Red fruit (F) is dominant to yellow fruit (f). A cross is carried out between two pure lines of tomato plants, one having regular leaves and red fruit and the other having potato leaves and yellow fruit. The F1 generation all have regular leaves and red fruit. The F1individuals are then crossed with one another. Complete a Punnett square to determine the expected F2 progeny on the basis of Mendel’s Law of Independent Assortment, which states that the alleles for one gene segregate independently of the alleles for other genes during gamete formation. Record the phenotypes and the phenotype ratio of the F2 generation in lowest terms.arrow_forwardMiniature wings in Drosophila result from an X-linked allele (w) that is recessive to the allele for long wings (+). In a cross of a long winged male with a long winged female, the following offspring were obtained: 100 long winged males, 106 miniature winged males, and 480 long winged females. Given this result, the female must be a carrier of the miniature wing allele. True Falsearrow_forward
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