BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
10th Edition
ISBN: 9781305967359
Author: STARR
Publisher: CENGAGE L
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Textbook Question
Chapter 12, Problem 11SA
_________ contributes to variation in traits among the offspring of sexual reproducers.
| a. Crossing over | c. Fertilization |
| b. Chromosome segregation | d. all of the above |
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Inbreeding is sexual reproduction between individuals that are
a. homozygous.
b. heterozygous.
c. part of the same genetic lineage.
d. both a and c.
Which of the processes does not lead to variation in offspring with the same parents?*
A. Random fusion of gametes from different parents.
B. Random assortment of chromosomes in M1
C.Crossing over of chromosomes
D.Interkinesis
How does the sexual life cycle increase the genetic variation in a species?
a. by providing gametes with different combinations of parental chromosomes.
b. by allowing the combination of chromosomes from two different individuals.
c. by allowing recombination of the alleles on a chromosome.
d. A and B only.
e. A, B, and C.
Explain your answer.
Chapter 12 Solutions
BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
Ch. 12 - One evolutionary advantage of sexual over asexual...Ch. 12 - Alternative forms of the same gene are called...Ch. 12 - Meiosis is a necessary part of sexual reproduction...Ch. 12 - Meiosis ________. a. occurs only in germ cells of...Ch. 12 - Sexual reproduction in animals requires ________ ....Ch. 12 - Dogs have a diploid chromosome number of 78. How...Ch. 12 - Prob. 7SACh. 12 - Prob. 8SACh. 12 - Crossing over mixes up _______ . a. chromosomes c....Ch. 12 - Crossing over happens during which phase of...
Ch. 12 - _________ contributes to variation in traits among...Ch. 12 - Which of the following is one of the very...Ch. 12 - Match each term with its description....Ch. 12 - In your own words, explain why sexual reproduction...Ch. 12 - Make a simple sketch of meiosis in a diploid germ...Ch. 12 - The diploid chromosome number for the body cells...
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- Meiosis is a necessary part of sexual reproduction because it_____ . a. divides two nuclei into four new nuclei b. reduces the chromosome number for gametes c. gives rise to new allelesarrow_forwardIn biology, what do you think does the garden peas has as a good model for genetic studies? A.) Few offsprings per generation B.) Has several paired characteristics C.) Long generation time D.) Only capanble of self-fertilizationarrow_forwardwhich of these could lead to the mistake evident in the karyotype? A) a failure of cytokinesis after meiosis I in gamete formation B) a nondisjunction in meiosis II in gamete formation C) crossing over in meiosis ! in gamete formation D) fertilizaton by two sperm in zygote formationarrow_forward
- Napoleon Dynamite’s favorite animal is a liger, a cross between a lion and a tiger. Although both are hybrids, ligers can reproduce while mules cannot. Provide a scientific explanation for this difference in fertility.arrow_forwardAs you can now understand, meiosis creates a very large amount of genetic variability within a population. Why might this be advantageous?arrow_forwardWhat makes sexually reproduced offspring genetically different from their parents? a. Genetic recombination during mitosis b. Genetic recombination during meiosis c. Sexual reproduction does not produce genetically different offspring d. Crossing over during mitosisarrow_forward
- In humans, sexual reproduction that produces an embryo, which then develops into a fetus, requires: a. Neither mitosis or meiosis b. Mitosis c. Both mitosis and meiosisarrow_forwardWhich of the following is not a contributor to genetic variation? (a) binary fission (b) crossing-over of homologous chromosomes (c) random assortment of homologous chromosomes (d) fertilizationarrow_forwardWhich type of life cycle has both a haploid and diploid multicellular stage? a. an asexual life cycle b. diploid-dominant c. haploid-dominant d. alternation of generationsarrow_forward
- The term endopolyploidy refers to the phenomenon of havinga. too many chromosomes.b. extra chromosomes inside the cell nucleus.c. certain cells of the body with extra sets of chromosomes.d. extra sets of chromosomes in gametes.arrow_forwardMeiosis_______ . a. occurs only in animals b. supports growth and tissue repair in multicelled species c. gives rise to genetic diversity among offspring d. is part of the life cycle of all cellsarrow_forwardHow do each of the following contribute to genetic variation in offspring? a. Crossing over b. Random assortment of homologous chromosomes c. Fertilizationarrow_forward
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