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 13TYU
EVOLUTION LINK Could hawthorn and apple maggot flies be considered an example of assortative mating, which was discussed in Chapter 19? Explain your answer.
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Could hawthorn and apple maggot flies be considered an example of assortative mating? Explain your answer
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INTRODUCTION
In most species of Drosophila, a female mating with a single male usually supplies sufficient sperm to fertilize her lifetime supply of eggs. Moreover, mating is often costly to female flies. So why do females of some species mate more than once? Perhaps they do this to assess the quality of males and/or the sperm males produce via sperm competition.
Tom Price, Nina Wedell, and their colleagues at the University of Exeter provide evidence for the sperm competition hypothesis. They show multiple mating increases in frequency when a selfish genetic element that reduces sperm quality is prevalent.
In Drosophila, females are XX and males are XY. They normally occur in equal numbers. In D. pseudoobscura, males that harbor the X-linked selfish genetic element sex ratio (SR) have produced nearly all female progeny, as SR sabotages Y-bearing sperm. The SR element gains a tremendous transmission advantage but…
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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- Explain how and why the queen honey bee abort the sexual maturation of the worker bees?arrow_forwardA black mouse mate with brown mouse and all the offspring are black .why are no brown offspring producedarrow_forwardHow does the sexual life cycle increase the genetic variation in a species? By increasing gene stability By allowing fertilization By allowing crossing over By conserving chromosomal gene order By decreasing mutation frequencyarrow_forward
- In some animal species, being tall is dominant over being short. If a homozygous dominant individual mates with a short individual, what is the chance that their offspring will be heterozygous?arrow_forwardHow is the frequency of cotransduction related to the relative position of genes on a bacteial chromosome? Draw a map of three genes and describe the expected relationship of cotransduction frequencies to the map.arrow_forwardExplain and elaborate how and why the queen honey bee abort the sexual maturation of the worker bees?arrow_forward
- we discuss various mechanisms of sex determination, including the XX/XY system of placental mammals, and the ZZ/ZW system of birds. Monotremes, the most primitive mammals, have a very intriguing sex determination scheme that shares elements of both of these systems. Please use the internet to learn more about how sex in monotremes is determined. Then write a short essay (300-400 words) describing this system and comparing/contrasting it to the XX/XY and ZZ/ZW systems.arrow_forwardSome animals in captivity have reproduced without the need for a mate in a process called parthenogenesis. Examples include boas, pythons, bonnethead sharks, and komodo dragons. Initially, scientists thought this occurred because the animals were kept in optimal conditions for reproduction, but lacked access to a mate. However, scientists were surprised to discover that some species in the wild with access to mates also reproduce through parthenogenesis. An example is the pit-viper. Compare and contrast the processes of asexual reproduction through parthenogenesis and sexual reproduction for an animal such as the python. Describe the processes of i. asexual reproduction through parthenogenesis ii. sexual reproduction 2. Describe two pros and two cons of each form of reproduction. Explain each one.arrow_forwardMy college Bio teacher asked me this question in response to one of my photos I posted on Facebook: "I wonder why some birds exhibit sexual dimorphism while others do not." Can someone explain this phenomenom in detail?arrow_forward
- Animals exhibiting external fertilisation produce a large number of gametes. Pick the appropriate reason from the following. (a) The animals are small in size and want to produce more offsprings. (b) Food is available in plenty in water. (c) To ensure better chance of fertilisation. (d) Water promotes production of large number of gametes.arrow_forwardWhat are the------ a. main three differences and three similarities between gametes of frog and fish. b. different Reproductive strategies in fishes? Explain with the help of examples. c. Draw reproductive tract of henarrow_forwardYou want to cultivate truffles for cooking. What is the problem with cultivating a species that only has an asexual lifecycle, assuming genetic variation is not a concern (explain your answer)?arrow_forward
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