MODIFIED MASTERINGBIO.STAND-ALONE CODE
2nd Edition
ISBN: 9781323199633
Author: Pearson
Publisher: PEARSON C
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Chapter 13.4, Problem 2CC
The diploid number for fruit flies is 8, and the diploid number for grasshoppers is 46. If no crossing over took place, would thc
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Fruit flies are unusual in that the male fruit flies do not undergo crossovers during meiosis. If you had taken 20 of the F1 Males with lobe eyes and crossed them to 20 females that were true breeding for reduced bristles and disrupted wings what phenotypes and in what proportions would you expect in the offspring?
A green salamander is mated with a white salamander. In the offspring, 49% of their abies are green and 51% of the babies are white. What is the genotype of the green salamander?
A male fruit fly, heterozygous for both vestigial wings and ebony body, is crossed with a female homozygous for normal wings and heterozygous for ebony body. What fraction of their offspring will have normal wings and an ebony body?
Chapter 13 Solutions
MODIFIED MASTERINGBIO.STAND-ALONE CODE
Ch. 13.1 - MAKE CONNECTIONS Using what you know of gene...Ch. 13.1 - How does an asexually reproducing eukaryotic...Ch. 13.1 - WHATIF? A horticulturalist breeds orchids, trying...Ch. 13.2 - MAKE CONNECTIONS In Figure 13.4. how many DNA...Ch. 13.2 - VISUAL SKILLS In The karyotype shown in Figuro...Ch. 13.2 - WHAT IF? A certain eukaryote lives as a...Ch. 13.3 - MAKE CONNECTIONS Comparc tho chromosomes in a...Ch. 13.3 - WHAT IF? After the synaptonemal complex...Ch. 13.4 - What is the original source of Variation among the...Ch. 13.4 - The diploid number for fruit flies is 8, and the...
Ch. 13.4 - Prob. 3CCCh. 13 - Explain why human offifuing resemble their parents...Ch. 13 - Compare the life cycles of animals and plants,...Ch. 13 - Prob. 13.3CRCh. 13 - Prob. 13.4CRCh. 13 - A human cell containing 22 autosomes.and a Y...Ch. 13 - The two homologs of a pair move toward opposite...Ch. 13 - Meiosis II is similar to mitosis in that (A)...Ch. 13 - Prob. 4TYUCh. 13 - If we continue to follow the cell lineage from...Ch. 13 - DRAW IT The diagram shows a cell in meiosis. (a)...Ch. 13 - Explain how you can tell that the cell in question...Ch. 13 - EVOLUTION CONNECTION Many species can reproduce...Ch. 13 - SCIENTIFIC INQUIRY The diagram in quest ion 6...Ch. 13 - Prob. 10TYUCh. 13 - SYNTHESIZE YOUR KNOWLEDGE For selected answers,...
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- If you ignore the effect of crossing over, would you expect the genetic information in the secondary oocyte and the first polar body to be identical? Explain your answer completely.arrow_forwardSuppose that the short allele is a meiotic drive gene, and 80% of the gametes from a heterozygous individual with tall and short alleles contain short alleles. If tall is dominant to short, what percent of individuals from a cross between a heterozygous tall individual and a homozygous recessive individual will be tall?arrow_forwardImagine you have two pure-breeding lines of canaries,one with yellow feathers and the other with brownfeathers. In crosses between these two strains, yellowfemale × brown male gives only brown sons anddaughters, while brown female × yellow male givesonly brown sons and yellow daughters. Propose ahypothesis to explain these resultsarrow_forward
- For a certain chromosomal region, the mean number of crossovers at meiosis is calculated to be two per meiosis. In that region, what proportion of meioses are predicted to have (a) no crossovers? (b) one crossover? (c) two crossovers?arrow_forwardTable 8.1 shows that Turner syndrome occurs when an individual inherits one X chromosome but lacks a second sex chromosome. Can Turner syndrome be due to nondisjunction during oogenesis, spermatogenesis, or both? If a phenotypically normal couple has a color-blind child (due to a recessive X-linked allele) with Turner syndrome, did nondisjunction occur duringoogenesis or spermatogenesis in this child’s parents? Explain your answer.arrow_forwardOn average, what proportion of the genome in the following pairs of humans would be exactly the same if no crossing over took place? (For the purposes of this question only, we will ignore the special case of the X and Y sex chromosomes and assume that all genes are located on nonsex chromosomes.) Q. Two full siblings (offspring that have the same two biological parents)arrow_forward
- Assume for a moment that crossing-over did not occur. Would you agree that you received half of your chromosomes from each parent? Would you agree that you received one-quarter of your chromosomes from each grandparent? Would the answer to these questions change if you allowed for crossing-over to have occurred?arrow_forwardFruit flies with one allele for curly wings (Cy) and one allele for normal wings (Cy+) have curly wings. When two curly-winged flies are crossed, 2/3 of the offspring have curly wings and 1/3 have normal wings. If a curly-winged fly is mated to a normal-winged fly, how many flies of each type would you expect among 180 offspring?arrow_forwardIn four-o'-clock plants, the allele for red flowers is incompletely dominant to the allele for white flowers, so heterozygotes have pink flowers. What ratios of flower colors would you expect among the offspring of white flower plants X pink flower plants.arrow_forward
- A cat is born with two X chromosomes and one Y chromosome. One of the X chromosomes carries the black fur allele and the other carries the orange fur allele. Would you expect this cat to be a male or female? Would it be calico?arrow_forwardIn the fruit fly, Drosophila, eye color is a sex-linked recessive trait located on the X chromosome. Red eyes are dominant over white eyes. If a heterozygous female breeds with a white-eyed male, what percentage of the offspring are expected to have red eyes?arrow_forwardChickens with shortened wings and legs are called creepers. When creepers are mated to normal birds, they produce creepers, and normal individuals with equal frequency. When creepers are mated to creepers, they produced three creepers to one normal, (one creeper died). Crosses between normal birds produced normal progeny only. How can these results be explained using C-c notation?arrow_forward
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