Gen Combo Ll Biology; Connect W/learnsmart Labs Access Card
4th Edition
ISBN: 9781259853197
Author: Robert Brooker
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Chapter 25.2, Problem 1CC
Summary Introduction
To determine: The number of chromosomes in the hybrid of the cross between the Galeopsis.tetrahit and Galeopsis.pubescens with Galeopsis.tetrahit.
Introduction: The chromosomes present in the offspring are the mixture of the chromosomes of the parent organisms that are divided into half to form gametes, which then combine to form the zygote. Hence, zygote contains each half of the parental chromosomes.
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Chapter 25 Solutions
Gen Combo Ll Biology; Connect W/learnsmart Labs Access Card
Ch. 25.1 - Can you think of another example of two different...Ch. 25.1 - Prob. 1BCCh. 25.1 - Is temporal isolation an example of a prezygotic...Ch. 25.1 - Prob. 3CCCh. 25.2 - Prob. 1BCCh. 25.2 - Prob. 1EQCh. 25.2 - Prob. 2EQCh. 25.2 - Prob. 3EQCh. 25.2 - Prob. 1CCCh. 25.2 - Prob. 2CC
Ch. 25.4 - Evo-Devo: Evolutionary Developmental Biology...Ch. 25.4 - Prob. 2CCCh. 25.4 - Prob. 1BCCh. 25.4 - Prob. 3CCCh. 25 - Macroevolution refers to evolutionary changes that...Ch. 25 - Prob. 2TYCh. 25 - Prob. 3TYCh. 25 - Prob. 4TYCh. 25 - Prob. 5TYCh. 25 - Prob. 6TYCh. 25 - Prob. 7TYCh. 25 - Prob. 8TYCh. 25 - Prob. 9TYCh. 25 - Prob. 10TYCh. 25 - What is the key difference between prezygotic and...Ch. 25 - What are the key differences between gradualism...Ch. 25 - Prob. 3CQCh. 25 - Prob. 1COQCh. 25 - Discuss the type of speciation (allopatric or...
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- A large plant arose in a natural population. Qualitatively,it looked just the same as the others, except much larger. Is it more likely to be an allopolyploid or anautopolyploid? How would you test that it was a polyploid and not just growing in rich soil?arrow_forwardMost organisms with XX-XY sex determination have pseudoautosomal regions, portions of the X and Y chromosomes that are homologous. Would you predict that organisms with ZZ-ZW sex determination have pseudoautosomal regions of homology between Z and W chromosomes? Explain your answer.arrow_forwardImagine that Species A and Species B are closely related species. Species A has one hemoglobin gene, located on chromosome 5. Species B has two hemoglobin genes, one located on chromosome 5 and one located on chromosome 8. Based solely on this information, it is possible that the ancestor of Species A and Species B had one hemoglobin gene, and that a large-segment duplication followed by a translocation resulted in the second hemoglobin gene of Species B. True Falsearrow_forward
- Asaparrow_forwardSuppose that species I in Figure had 2 n = 10 and species II in that figure had 2 n = 12. How many chromosomes would be present in the allotetraploid at the bottom of the figure?arrow_forwardA large plant arose in a natural population. Qualitatively, it looked just the same as the others, except much larger. Is it more likely to be an allopolyploidarrow_forward
- Answer the following series of questions based on this karyotype obtained from a newly discovered plant species. 6 7 10 11 12 自 0 13 14 15 16 17 18 19 20 21 22 а. What is the ploidy of the genome shown in the karyotype? b. How many chromosomes are shown in this karyotype? c. How many sister chromatids are shown in the content shown in the circle? d. Given a particular locus, provide one representation of a genotype for a heterozygote e. How many different alleles for a given gene can this plant species carry? f. What is the haploid number if a somatic cell has this karyotype? 摩arrow_forwardSpecies I is diploid (2n=8) with chromosomes AABBCCDD. Related species II is diploid (2n=8) with chromosomes MMNNOOPP. Individuals with the ff. sets of chromosomes represent what types of chromosome mutations (be very specific)? Give the level of ploidy (in equation form) and resultant chromosome number for each plant. AABBCCCCDD (c) MMNNOOOPPP (e) AABBCDD AABBDD (d) AABBCCDDMNOParrow_forwardSuppose researchers studied the first chromosome of a new species and mapped three genes of interest, indicated as a, b, and c. A three‑factor cross was performed and the number of gametes formed from the F2 generation was recorded in a table. Note that the order of genes in the table is arbitrary. Calculate the recombination frequencies for each given gene pair in map units. ?+ ?+ ?+ ? ? ? ? ?+ ?+ ?+ ? ? ? ?+ ? ?+ ? ?+ ? ? ?+ ?+ ?+ ? 173 176 35 33 11 10 3 1 After completing the gene mapping, the researchers treated individuals to induce inversions in the chromosomes. After treatment, another three‑factor cross was performed and the number of gametes formed from the F2 generation was recorded in a second table. Note that the order of genes in the table is arbitrary. ?+ ?+ ?+ ? ? ? ? ?+ ?+ ?+ ? ? ? ?+ ? ?+ ? ?+ ? ? ?+ ?+ ?+ ? 188 185 24 26 1 0 49 46 Calculate the recombination frequencies for each given gene pair in map units.arrow_forward
- Chromosomal rearrangements are a source for reproductive barriers (low hybrid fitness) and are suppressors of recombination. The most commonly referred to rearrangements involved in human evolution are the formation of the Y chromosome and the variation of karyotypes between primates, especially the formation of human chromosome 2. Using the diagram below identify the types of chromosomal rearrangements and describe the impact on genotype.arrow_forwardSpecies I has 2 n = 8 chromosomes and species II has 2 n = 14 chromosomes. What would the expected chromosome numbers be in individuals with the following chromosome mutations? Give all possible answers. Q. Allotriploidy including species I and IIarrow_forwardPlant species A has a diploid chromosome number of 12. Plantspecies B has a diploid number of 16. A new species, C, arises asan allopolyploid from A and B. The diploid number for speciesC would probably be(A) 14. (B) 16. (C) 28. (D) 56.arrow_forward
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