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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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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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
What is one statement that would support the theory that all organisms are related?
A) The genetic code is almost universal.B) All flies have 2 wings.C) Eukaryotes have mitochondria.D) Prokaryotes have circular chromosomes.E) That the Theory of Pangenesis has held up to scrutiny for thousands of years
What is the difference between cross and self-fertilization? A. In cross-fertilization the gametes from one plant are used to fertilize the gametes of another plantB. In cross-fertilization the gametes from one plant are used to fertilize the gametes from the same plant
C. In self-fertilization the gametes from one plant are used to fertilize the gametes from another plantD. In cross-fertilization insects are used to pollinate the plants while in self-fertilization the investigator pollinates the plants
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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- Why are toy poodles and rotweilers (dog breeds) members of the same species? A) They can mechanically breed with one another B) Their chromosomes and genes align. All of these D) They can produce offspring that are able to produce offspringarrow_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_forwardanswer all for like fast pleassarrow_forward
- DNA 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_forwardPrezygotic isolating mechanisms prevent hybrid offspring from occurring between species because (a) the resulting offspring are not fertile and cannot reproduce. (b) the egg and sperm fuse and form a zygote, but it does not survive. (c) the egg and sperm do not ever meet or, if they do, cannot fuse to form a zygote. (d) all of the abovearrow_forwardThe term heterozygous means; a) An organism has two different sex chromosomes Ob) An organism was originally twins that fused together in the zygote stage c) An organism has two identical alleles for a given gene d) An organism has two different alleles for a given genearrow_forward
- a.)Meiosis in a plant b.)Meiosis in an animal c.)Telophase II d.)Meiosis in an animal e.)Mitosis in a plantarrow_forwardHomologous chromosomes a) are formed when the chromosomes separated during anaphase b) are matching set of chromosomes that a cell receives from both parents c) carry the same alleles in the same sequence d) are a set of identical alleles that a cell receives from both parentsarrow_forwardA species with zero senescence would: A.) O Not show any decline in fitness with age. B.) Mature at an early age. C.) Live forever. D.) Not have any deleterious alleles.arrow_forward
- Homologous chromosomes contain the same _________________, but may not contain the same ________________. A) sister chromatids; genes B) sister chromatids; alleles C) genes; alleles D) alleles; genesarrow_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_forwardThe slipper orchid is a highly prized flower that undergoes self-fertilization. You own a slipper orchid that has the genotype Aabb. What will be the genotype of the plant’s offspring? a)All offspring will also be Aabb b)¼ AAbb, ½ Aabb, ¼ aabb c)½ Aa, ½ bbarrow_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