Biology: The Unity and Diversity of Life (MindTap Course List)
14th Edition
ISBN: 9781305073951
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Chapter 12, Problem 14SQ
________ contributes to variation in traits among the offspring of sexual reproducers.
- a. Crossing over
- b. Random attachment of chromosomes to spindle poles
- c. Fertilization
- d. both a and b
- e. all are factors
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Students have asked these similar questions
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
The process of meiosis ensures that organisms will have
a. The same diploid number its parents have.
b. Different numbers of chromosomes from what are parents have.
c. The ability to reproduce by budding.
d. A different haploid number from what its parents have.
e. Splits into two daughter cells.
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 alleles
Chapter 12 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 12 - One evolutionary advantage of sexual over asexual...Ch. 12 - Meiosis is a necessary part of sexual reproduction...Ch. 12 - Meiosis _________. a. occurs in all eukaryotes b....Ch. 12 - Sexual reproduction in animals requires ______. a....Ch. 12 - Meiosis ______ the parental chromosome number. a....Ch. 12 - Dogs have a diploid chromosome number or 78. How...Ch. 12 - The cell in the diagram to the right is in...Ch. 12 - Prob. 8SQCh. 12 - Prob. 1DAACh. 12 - Prob. 2DAA
Ch. 12 - Prob. 3DAACh. 12 - Prob. 9SQCh. 12 - Crossing over mixes up ______. a. chromosomes b....Ch. 12 - Crossing over happens during which phase of...Ch. 12 - Which of the following is one of the very...Ch. 12 - Match each term with the best description. __...Ch. 12 - ________ contributes to variation in traits among...Ch. 12 - The diploid chromosome number for the body cells...Ch. 12 - In your own words, explain why sexual reproduction...Ch. 12 - Different populations of the tiny freshwater...Ch. 12 - Make a simple sketch of meiosis in a cell with a...
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- _________ contributes to variation in traits among the offspring of sexual reproducers. a. Crossing over c. Fertilization b. Chromosome segregation d. all of the abovearrow_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_forwardIn 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_forward
- Double fertilization means that(A) flowers must be pollinated twice to yield fruits and seeds.(B) every egg must receive two sperm to produce an embryo.(C) one sperm is needed to fertilize the egg, and a second spermis needed to fertilize the polar nuclei.(D) every sperm has two nucleiarrow_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_forwardWhich statement about meiosis (in humans) is FALSE? Select one: a. It reduces the amount of genetic material (chromosomes) by half b. It is part of the process of sexual reproduction c. The cells it produces are identical to each other d. It produces haploid gametes e. It occurs only in germline cells of the reproductive organsarrow_forward
- Which of the following mechanisms contributes to genetic variation through sexual reproduction via the random orientation of pairs of homologous chromosomes at metaphase of meiosis I? A. crossing over B. random fertilization C. independent assortment of chromosomes D. cytokinesisarrow_forwardWhich of the following consequences of sexual reproduction is considered disadvantageous? A. More rapid evolution. B. Generation of novel genotypes. C. Clearance of deleterious mutations. D. Reduced relatedness.arrow_forwardThe event that leads from the haploid stage to the diploid stage in alternation of generations is _______. a. meiosis b. mitosis c. fertilization d. germinationarrow_forward
- Meiosis_______ . 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_forwardWhich of the following is an advantage of asexual reproduction? A. The population can reproduce more rapidly. B. It takes time and energy to find a mate. C. It takes two parents to reproduce. D. There is decreased genetic variation.arrow_forwardbut, luckily, scientists develop a way for women to produce babies by virgin birth. Meiocytes are converted directly (without undergoing meiosis) into zygotes, whichimplant in the usual way. What would be the short- andlong-term effects in such a society?arrow_forward
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