Biology (MindTap Course List)
11th Edition
ISBN: 9781337392938
Author: Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher: Cengage Learning
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Textbook Question
Chapter 20, Problem 3TYU
Interspecific hybrids, if they survive, are (a) always sterile (b) always fertile (c) usually sterile (d) usually fertile (e) never sterile
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Plasmogamy is the fusion of(a) two haploid cells including their nuclei.(b) two haploid cells without nuclear fusion.(c) sperm and egg.(d) sperm and two polar nuclei.
Please try to break the solutions into as many steps as practically possible and the steps should come one by one and they should be short and crisp and plagiarism-free.
In a diploid species, each individual possesses (a) one allele for each locus (b) two alleles for each locus (c) three or more alleles for each locus (d) all the alleles found in the gene pool (e) half of the alleles found in the gene pool
Which of the following is least likely to produce genetic variation in the offspring of an individual?
(a) a DNA replication error caused by DNA polymerase in a body cell of the individual
(b) a cross over event during meiosis that creates a new combination of alleles in the gametes
(c) independent assortment of chromosomes during meiosis that creates a new combination of alleles in the gametes
(d) the random fertilization of an egg cell by a sperm cell during sexual reproduction
Chapter 20 Solutions
Biology (MindTap Course List)
Ch. 20.1 - Describe the biological species concept and list...Ch. 20.1 - Prob. 1CCh. 20.1 - Prob. 2CCh. 20.1 - Prob. 3CCh. 20.2 - Explain the significance of reproductive isolating...Ch. 20.2 - What barriers prevent wood frogs and leopard frogs...Ch. 20.2 - How is temporal isolation different from...Ch. 20.2 - Prob. 3CCh. 20.2 - Of which postzygotic barrier is the mule an...Ch. 20.3 - Prob. 3LO
Ch. 20.3 - Explain the mechanisms of sympatric speciation and...Ch. 20.3 - What are five geographic barriers that might lead...Ch. 20.3 - Prob. 2CCh. 20.3 - Prob. 3CCh. 20.4 - Prob. 5LOCh. 20.4 - Prob. 1CCh. 20.5 - Define macroevolution.Ch. 20.5 - Discuss macroevolution in the context of novel...Ch. 20.5 - Prob. 8LOCh. 20.5 - Why are evolutionary novelties important to...Ch. 20.5 - Prob. 2CCh. 20.5 - Prob. 3CCh. 20.5 - What is the relationship between mass extinction...Ch. 20 - A prezygotic barrier prevents (a) the union of egg...Ch. 20 - The reproductive isolating mechanism in which two...Ch. 20 - Interspecific hybrids, if they survive, are (a)...Ch. 20 - The first step leading to allopatric speciation is...Ch. 20 - The pupfishes in the Death Valley region are an...Ch. 20 - Which of the following evolutionary processes is...Ch. 20 - According to the punctuated equilibrium model, (a)...Ch. 20 - The evolutionary conversion of reptilian scales...Ch. 20 - Adaptive radiation is common following a period of...Ch. 20 - The Hawaiian silverswords are an excellent example...Ch. 20 - VISUALIZE Use two different colors to depict the...Ch. 20 - Prob. 12TYUCh. 20 - EVOLUTION LINK Could hawthorn and apple maggot...Ch. 20 - Prob. 14TYUCh. 20 - EVOLUTION LINK Examine Figure 20-2c and predict...
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- Which of the following is not a contributor to genetic variation? (a) replication of sister chromatids (b) crossing-over of homologous chromosomes (c) random assortment of homologous chromosomes (d) fertilizationarrow_forward2) Meiosis and sexual reproduction are, in large part, responsible for genetic variation within a population. Meiosis supports genetic variation in several ways. All BUT ONE applies to meiosis, sexual reproduction and genetic variation. A) Meiosis is preceded by DNA replication of chromosomes in the nucleus of the mother cell. B) As seen in the diagram, during meiosis crossing over, or swapping of DNA segments, may occur. C) During fertilization each parent randomly contributes a unique set of chromosomes to the zygote. D) Because of recombination and independent assortment during meiosis, each of the four gametes contains a different set of DNA. Not Gradedarrow_forwardAn inherited disorder caused by a defective or absent enzyme is called (a) a karyotype (b) trisomy (c) a reciprocal translocation (d) an inborn error of metabolism (e) an aneuploidyarrow_forward
- The process by which haploid cells are produced from diploid cells is called A( sexual reproduction. B) meiosis C) gameoto reduction D) mitosisarrow_forwardPlant breeders use colchicine to A) prevents cytokinesis in somatic cells B) increase the occurrence of unequal crossing over events during meosis C) stop the segregation of homologous chromosomes during meiosis D)  triggers the production of haploid gametes and diploid organismarrow_forwardDNA recombination occurs during the process of __________ and affects the population by ________ A) Meiosis, decreasing genetic variation B) Meiosis, increasing genetic variation C) Mitosis, decreasing genetic variation D) Mitosis, increasing genetic variation E) Both B and D are correct F) Both A and C are correctarrow_forward
- Answer option for 1: A) independent, B) mutually exclusive, C) mutually inclusive, D) interdependentAnswer options for 2: A) add, B) multiply, C) multiply then add, D) add then divide3 and 4 are fill in the text box.arrow_forwardSelect all of the statements that are true of meiosis A) Chromosome number is reduced to haploid status B) It generates genetic diversity among daughter cells C) Daughter cells are identical to each other but not to the parent D) It generates exact copies of the parent cell E) It is used for growth and repair of the organism F) It involves two rounds of cell divisionarrow_forwardIn a life cycle with alternation of generations, multicellularhaploid forms alternate with(A) unicellular haploid forms.(B) unicellular diploid forms.(C) multicellular haploid forms.(D) multicellular diploid forms.arrow_forward
- If the parent diploid cell starts with 12 Chromosome and undergoes mitosis, then how many will the daughter cells have?A) 48 B) 12 C) 5 D) 24 20. If the parent diploid cell starts with 48 Chromosome and undergoes meiosis, then how many will the daughter cells have?A) 48 B) 12 C) 5 D) 24arrow_forwardUnlike mitosis, meiosis in male mammals results in the formation of a) one haploid gamete b) three diploid gametes c) four diploid gametes d) four haploid gametes Please I need a surely answer and a quicker responsearrow_forwardIf the liver cells of an animal have 48 chromosomes, the sperm cells would have how many chromosomes? Question 5 options: a) 24 b) Twice the diploid number c) Half the haploid number d) 48arrow_forward
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genetic recombination strategies of bacteria CONJUGATION, TRANSDUCTION AND TRANSFORMATION; Author: Scientist Cindy;https://www.youtube.com/watch?v=_Va8FZJEl9A;License: Standard youtube license