Campbell Biology
12th Edition
ISBN: 9780135188743
Author: Urry
Publisher: PEARSON
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Chapter 13.4, Problem 3CC
Summary Introduction
To explain: The possibility of
Concept introduction:
Crossing over is the process of exchange of gene segments among non-sister homologous chromatids. It forms recombinant chromosomes that contain genetic materials from both parents that generate genetic variation.
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MAKE CONNECTIONS Look at Figure 12.7 and imagine the twodaughter cells undergoing another round of mitosis, yielding four cells.Compare the number of chromosomes in each of those four cells, aftermitosis, with the number in each cell in Figure 13.8, after meiosis. Whatis it about the process of meiosis that accounts for this difference, eventhough meiosis also includes two cell divisions?
MAKE CONNECTIONS The ABO blood type locus hasbeen mapped on chromosome 9. A father who has typeAB blood and a mother who has type O blood have achild with trisomy 9 and type A blood. Using this information, can you tell in which parent the nondisjunctionoccurred? Explain your answer. (See Figures 14.11and 15.13.)
Chapter 13 Solutions
Campbell Biology
Ch. 13.1 - MAKE CONNECTIONS Using what you know of gene...Ch. 13.1 - Prob. 2CCCh. 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 - Prob. 3CCCh. 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 - Prob. 13.2CRCh. 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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- Discuss Concepts One of the human chromosome pairs carries a gene that influences eye color. In an individual human, one chromosome of this pair has an allele of this gene that contributes to the formation of blue eyes. The other chromosome of the pair has an allele that contributes to brown eye color (other genes also influence eye color in humans). After meiosis in the cells of this individual, what fraction of the nuclei will carry the allele that contributes to blue eyes? To brown eyes?arrow_forward. State where cells divide mitotically and where they divide meiotically in a fern, a moss, a flowering plant, apine tree, a mushroom, a frog, a butterfly, and a snail.arrow_forwardVISUALIZE Draw a simple sketch illustrating how nondisjunction in meiosis can lead to Down syndrome.arrow_forward
- | The Role of Meiosis Key Idea: There are two types of cell division in eukaryotes, mitosis and meiosis, but only meiosis produces cells that are genetically different to the parent cell. New cells are formed when existing cells divide. There are two forms of cell division in eukaryotes, mitosis and meiosis. Mitosis produces two identical daughter cells from a parent cell. Meiosis is a special type of cell division, and produces sex cells (gametes or spores) for sexual reproduction. In sexual reproduction, sex cells from two parents combine to form an individual that is genetically different to its parents. The sex cells in humans, called eggs and sperm, are produced by meiosis. Events occurring during meiosis creates gametes with unique combinations of gene variants and so creates genetic variability. Sexual reproduction rearranges and reshuffles the genetic material into new combinations. This is why family members may look similar, but they'll never be identical (except for…arrow_forwardQ1. Draw and label two cells at anaphase of mitosis and anaphase I of meiosis in a species having 2n - 4 chromosomes (one homologous pair of metacentric chromosomes and a pair of acrocentric chromosomes).arrow_forwardSelect two that apply. Which of the following generate genetic diversity in meiosis? homologous chromosomes are separated during anaphase II homologous chromosomes align individually during metaphase II O bivalents align independently from other bivalents during metaphase I sister chromatids exchange genetic material during prophase I homologous chromosomes exchange genetic material during prophase I meiosis goes through two rounds of divisionarrow_forward
- . A mature female wolf, with 78 diploid chromosomes in each somatic cell, produces haploid oocytes (egg cells) containing how many chromosomes per cell? 1 sex-determining chromosome (Y) and 38 autosomes 2 sex-determining chromosomes (XX) and 76 autosomes 1 sex-determining chromosome (X) and 39 autosomes 2 sex-determining chromosomes (XY) and 76 autosomes 1 sex-determining chromosome (X) and 38 autosomesarrow_forwardhello, please answer the following Biology correctly. I don't need an explanation, just the correct answer choices. Thank you. Bio Question: "In cats, yellow color is due to one allele, and black color is due to another allele. The heterozygous condition results in a color known as tortoise shell, with both alleles expressed. This gene is on the X chromosome. Which is an expected result of a cross between a yellow male and a tortoise-shell female? Mark all answers that apply." A - 25% of offspring will be black males B - 50% of the offspring will be yellow C- 25% of offspring will be black females D- 50% of the males will be tortoise-shellarrow_forwardunderstand how my sex cells were formed and as to how some properly segregated to enhance phenotypically my appearance. I have learned from this module that meiasig, lik osis, is preceded by the duplication of genetic materials which happens in (1) MOa mitosis and meiosis is that in meiosis, the cell divides (2) us chomaou The significant difference between to form genetically unique daughter cells. The first meiotic division, (4) starts with the condensation of duplicated genetic materials forming (3). darkly – staining finite bodies called (5) followed by the pairing of these condensed bodies known as (6)_ They were paired up based on their (7) Each homologous pair is known as (8). because the pair itself is composed of four sister chromatids. The process of pairing is followed by the blending of genetic materials for each homologous pair. This process is called (9) and due to this process, you inherit some of the traits coming from your parents. After this process, the homologous…arrow_forward
- Simulate a reciprocal cross up to the F2 generation. label your reciprocal cross and the colors of the nucleus and the cytoplasm, and the phenotypes of all individuals in the reciprocal cross. Big green Male cytoplasm Big red Female cytoplasm Small half-green-half-red F1 nucleus Small green Male nucleus Small red Female nucleus How to use the colours in the f2 generation?arrow_forwardSketch a series of diagrams showing each of the following, making sure to end each series with haploid cells:(a) How a pair of alleles for a single locus segregate in meiosis(b) How the alleles of two unlinked loci assort independently in meiosis(c) How the alleles of two linked loci undergo genetic recombinationarrow_forwardA species of cereal rye (Secale cereale) has a chromosome number of 14, while a species of Canadian wild rye (Elymus canadensis) has a chromosome number of 28. Sterile hybrids can be produced by crossing Secale with Elymus. (a) What would be the expected chromosome number in the somatic cells of the hybrids? (b) Given that none of the chromosomes pair at meiosis I in the sterile hybrid (Hang and Franckowlak, 1984), speculate on the anaphase I separation patterns of these chromosomes.arrow_forward
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