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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The law of segregation of chromosomes arises due to events in _________.
A.
Mitosis and meiosis II
B.
Mitosis and meiosis I
C.
Meiosis I only
D.
Meiosis II only
When two genes are genetically “linked”, gametes produced during meiosis will usually contain allele combinations that mimic the way the alleles were placed on the parent cell’s chromosomes unless what process successfully occurs?
Select one:
a.
Disjunction
b.
Self-fertilization
c.
Crossing over/recombination
d.
Aneuploidy
Homologous chromosomes move toward opposite poles of a dividing cell during
a.
fertilization
b.
meiosis II
c.
meiosis I
d.
mitosis
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 the parental chromosome number.a. doubles c. maintainsb. halves d. mixes uparrow_forwardWhich phase of meiosis reduces the chromosomenumber?a. prophase I c. anaphase Ib. prophase II d. anaphase IIarrow_forwardIdentify whether the following terms is related to either mitosis or meiosis or both. 1. Identify whether the following terms is related to either mitosis or meiosis or both. a. mitosis b. meiosis c. both 2. somatic cells/ body cells a. mitosis b. meiosis c. both 3. two genetically similar diploid cellsarrow_forward
- a. The ovaries produce secondary the female sex cells. b. Stem cells, called divide by to produce primary each form part of a c. At the onset of puberty, tens of thousands of ovaries. Between menarche and menopause, each primordial follicle develops into a in the and its primary oocyte completes d. Some primary oocytes become 23-chromosome cells that begin then pause. secondary oocyte is released into is completed when e. Each month, the uterine tube. the oocyte isarrow_forwardGametogenesis is d. The process of gamete formation which goes through one division of meiosis Oc. The process of gamete formation which goes through one division of mitosis b. The process of gamete formation where the number of chromosomes is halved for 23 chromosomes a. The process of gamete formation where the number of chromosomes is doubled for 46 chromosomes None of the choices are correct Question 3 or False: Meiosis undergoes two sets of divisions.arrow_forwardWhich of the following statements is INCORRECT? Mitosis is a conservative mechanism that preserves the genetic status quo. Meiosis is a special type of cellular division that occurs in gametes. After mitosis, two identical 2n daughter cells are produced. After meiosis I, four n daughter cells are produced. Genetic recombination or diversity is a feature of __________. A. Meiosis I C. Mitosis B. Meiosis II D. Choices A, B, and C are correct. The following are cellular events during prophase I, EXCEPT: A. Chromatin condensation C. Crossing-over B. Synapsis D. Paired homologs attach to spindle fibers. Which of the following statements refers to synapsis? It is the pairing of homologous chromosomes during meiosis. It is the alignment of chromosomes on the equatorial plate. It is the exchange of parts between non-sister chromatids. It represents the sites where crossing-over occurred. Which of the following events below…arrow_forward
- Organism X has the genotype Ccdd. How many different types of gametes can it make and in what proportion? * A. 3 Cd 1 cd B. 1 CD: 1 Cd : 1 cD 1 cd C. 1 Cc : 1 dd D. 1 Cd 1 cd A human female "carrier" who is heterozygous for the recessive, sex-linked trait hemophilia (XHXH), marries a normal male (XHY). What proportion of their male progeny will show the trait? A. 1/4 B. 1/2 C. 0 D. Allarrow_forwardMeiosis usually produces ________ daughter cells. a. two haploid b. two diploid c. four haploid d. four diploidarrow_forwardNondisjunction in meiosis can result in_____ . a. base-pair substitutions c. crossing over b. aneuploidy d. pleiotropyarrow_forward
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