Solved by a verified expert:Discussion Board: What’s the Genotype of Male Tortoiseshell Cats? 10 10 unread replies. 10 10 replies. A cat must have both orange and non-orange alleles to be a tortoiseshell (see Figure 11.4), so we would expect only female cats, which have two X chromosomes, to be tortoiseshell. Normal male cats (XY) can carry only one of the two alleles. Male tortoiseshell cats are rare and usually sterile. What might you guess their genotype to be?Chapter 14 Discussion Board: Is a River a Reproductive Barrier Between Mice Populations? No unread replies. No replies. Imagine you are conducting fieldwork and discover two groups of mice living on opposite sides of a river. Assuming that you will not disturb the mice, design a study to determine whether these two groups belong to the same species. If you could capture some of the mice and bring them to the lab, how might that affect your experimental design.Which of the following is a behavioral pattern that results from a proximate cause? A) A male sheep fights with another male because it helps it to improve its social position and find a mate. B) A goose squats and freezes motionless because that helps it to escape a predator. C) A female bird lays its eggs because the amount of daylight is decreasing slightly each day. D) A cat kills a mouse to obtain food. E) A cockroach runs into a crack in the wall and avoids being stepped on Which of the following best describes this? A cage with male mosquitoes in it has a small earphone placed on top, through which the sound of a female mosquito is played. All the males immediately fly to the earphone and thrust their abdomens through the fabric of the cage. A) Copulation is a fixed action pattern, and the female flight sound is a sign stimulus that initiates it. B) Through classical conditioning, the male mosquitoes have associated the inappropriate stimulus from the earphone with the normal response of copulation. C) The reproductive drive is so strong that when males are deprived of females, they will attempt to mate with anything that has even the slightest female characteristic. D) The males learn to associate the sound with a female and are thus attracted to it.Which of the following is a difference between plant and animal cells? animals have only a cell membrane, plants have only a cell wall plants have centrioles, animal cells do not plants have chloroplasts and large vacuole, animals have no chloroplasts and small vacuoles plants have more mitochondria because they make their own food.Chapter 12 Discussion Board: What are Some Applications for PCR Technology? 4 4 unread replies. 4 4 replies. PCR is a technology that has many useful applications with biotechnology. What are some of those applications? What are the advantages of PCR over gene cloning for generating many copies of a DNA fragment?Chapter 13 Discussion Board: How Does Antibiotic Overuse Alter the Evolution of Bacteria? 1 1 unread reply. 1 1 reply. Use some of the principles of evolutionary theory to explain how the overuse of antibiotics has altered the course of evolution for bacteria that have evolved antibiotic resistance.
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