The Disadvantages Of Sexual Diversity Of Reproducing Species

For example, the Sea Monkey females don’t breed with males, making the males go and breed with other species, creating hybrids. Also, it gave an example, involving both asexual and sexual reproductive shrimp. The results of that were only that half of the sexual population can produce eggs, while every individual in the asexual one can. This basically means that it won’t be too soon before the asexual population dominates over the other. This article related to current unit topics because right now we are talking about cell reproduction and something that is involved in that is Mitosis. In the article it mentioned how more DNA is needed to be built with double the amount of chromosomes from the asexual reproduction. Currently, we are learning about how in order for the cells to split, they need to copy the DNA to the chromosomes. Well, with double the amount of chromosomes, copying all that DNA to each is a very difficult task. Another example is with chromosomes, now with sexual reproduction a set of chromosomes is needed from both the mother and father, but in the case of asexual reproduction and the Sea Monkeys, the females just combine two of the eggs, making it have enough chromosomes to

Reproductive monogamy is defined as an exclusive sexual relationship between a female and a male based on their sexual interactions. Social Monogamy refers to male and female’s social living arrangement without sexual interactions. It refers to the living patterns, raising offsprings, and obtaining food. Monogamy is common in birds, but also occurs in invertebrates. Why would a male mammal choose to mate with one female when he can mate with more than one? Why would the male stay around instead of finding another female to live with? Many researchers have attempted to answer this question of why some mammals prefer monogamy over polygamy. Vole rats, one of the species that perform monogamous mating, demonstrate pair boding. Male and female pairs of vole rats have been observed together over several months, and the males stay with females even when the female is not reproductively active. A typical vole family in the wild is almost always consisted of one male, one female, and their offspring. In addition, unlike other species in which females are the only ones taking care of the offspring, vole rats share parental roles and even build nests together. Because they show these monogamous behaviors, they have served as a good species/model to learn about monogamy for neuroscientists. In this paper, monogamy, specifically in vole rats, will be explained along with its proximate and ultimate causes of this adaptation.

Sexual selection was an idea proposed by Darwin and refers to the process in which males and females attempt to maximize their chances of reproductive success. Within a species there are certain characteristics that make individuals attractive to potential mates. An example of this is in peacocks, female peacocks are attracted to males with long brightly colored tails, even though this makes them easier to be spotted by predators. This characteristic then evolves within the species due to how males with this characteristic have a higher chance of reproductive success and their characteristics being passed on to surviving offspring.

Judson contributes to onefs understanding of sex among different organisms in that she makes difficult concepts simple to comprehend. Although she uses scientific terminology, she limits it so that anyone can understand the technical information she shares. Judson also describes the types of environments in which each species and

D) Sexual reproduction is more likely to increase genetic variation than is asexual reproduction. E) Only asexual

Sex At Dawn by Chrstopher Ryan and Cacilda Jetha, describes our current society as a sexual hypocrisy where monogamy is the norm and everything else falls under taboo. Based on prehistoric facts, they argue that we derive from a sexually free and promiscuous culture, and were never meant to be in lifelong monogamous unions. In Paleofantasy by Martha Zuk, looks at evolutionary theorists, like Ryan and Jetha, who use the Paleolithic Age for guidance on how our current society should live. Zuk’s argument is that people want to make our nature into one-form, but humans are not designed for one-way/form of life. As for our sexual system it too can not be put into one-form. Zuk shows various points on popular assertions, creating uncertainty to the reader. This therefore shows how difficult it is to determine a precise natural sexual practice from our past, and debunking Ryan and Jetha. For this reason, Zuk provides a better argument regarding how we should use prehistoric history in present day.

There are many methods of reproduction, but the two main methods are sexual and asexual, but which one is more efficient or beneficial. Sexual reproduction is the fusing of two gametes to produce an offspring. This form of reproduction is used by a lot of organisms, including us. Asexual reproduction is reproduction that only involves one parent. (“Pros and cons of sexual and asexual reproduction”). I am going to focus on asexual reproduction and the Desert Grassland Whiptail Lizard. This unique lizard uses asexual reproduction. Asexual reproduction is better for this species of lizards because it only requires one parent, it is less risky, and the population is only female.

“If no such variations exist, the population rapidly goes extinct because it cannot adapt to a changing environment” (O’Neil, 1998-2013). Scientists call this reproductive success. “Within a specific environment context, one genotype will be better than another genotype in survival or reproduction for certain reasons having to do with the way its particular features relate to the environment or relate to other organisms within the population” (Futuyma, 2000-2014). The theory of evolution is explicable through various kinds of scientific research.

Thus, her breeding span is limited (79). In contrast, for males, it is minimal. He simply must produce sperm cells and go through with an act of copulation, in effect, his reproductive capability is limited by the number of females he mates with (Contrary to popular belief, humans are not a monogamous species but a largely monogamous and partly polgynous species) (Gray 79& 83). In addition, males must play the aggressor role in relationships and are more attracted to physical stimuli (Kanin pg. 71). These all require that males recognize love much more quicker then females (Kanin pg. 71).

Males and females differ considerably in how much they each invest in order to make offspring and a result of this, they approach mating with different methods. Researchers and scientists learn and examine these varying mating systems to explain how males and females pair up. A mating system explains the techniques males and females use to pair up when selecting a mate. It is important to begin by reviewing and understanding the reproductive strategies among primates. The major types of mating systems found in primates are monogamy and polygamy. Monogamy is a practice of mating in which one male pairs with one female. Polygamy also known as bisexual, is a pattern of mating in which a male mates with more than one female and a female mates with more than one male (Wong , 2010). Polygamy is then clarified into polygyny and polyandry. Polygyny is when one male mates with multiple females. Polyandry is when one female mates with multiple males. Recognizing the diversity of mating systems will help in understanding the interactive relationship of sexual size dimorphism and behavior in primates.

In contrast, when two individuals mate, the cells go through cell division or meiosis. This allows four daughter cells to produce from the original first cell. Since the offspring has genes and traits from both parents, the offspring will be unique. This is advantageous for evolutionary changes. Since each offspring is unique in their genetic material, some won’t be affected by a disease, such as HIV, AIDS, and viruses, as others might. This allows these offspring to survive. The

Intersexual selection describes one sex (commonly females) choosing male partners for copulation. Females tend to choose the males based on secondary sexual characteristics. Intrasexual selection, on the other hand, is competition within the same sex, in the hope of gaining access to the other sex for reproduction (Eberhard, 1996). It is commonly male species competing against each other for female partners. These two forms of sexual selection results in more developed offspring, as the fitter male will out-compete other males and also is more likely to be chosen be

Part of the evolutionary explanation is Trivers’ parental investment theory which argues that the origin of behavioural differences between men and women lies in the different ways of achieving reproductive success. Trivers

Scientist Van Valen used this as a metaphor for the evolutionary race saying that species keep running (evolving) to stay in the same place, but if they stop, they become extinct. This theory has been consistently added to and built upon by G. Bell in 1982, who applied it to host and parasite relationships, showing how evolution affects genotype frequencies and that changes come from maintaining sexual reproduction. (Lively, 2010) The Red Queen hypothesis demonstrates how species rely on competition for initiating evolution, and how there is a domino effect of change causing change. (Barnett and Hansen, 1996) In studies done by Barnett and Hansen (1996) using an organizational approach, evidence was found for Red Queen evolution in that organizations exhibited less failure if there was more competition. The research used banks as a model, and the results showed that in places only one existed, there was an advantage of a monopoly, but did not have any experience when exposed to competition. (Barnett and Hansen, 1996) The Red Queen hypothesis also shows that selection favors hosts that have rare resistance alleles. There also is research that shows generation time affects selection for sex, in that the longer it takes to reproduce, the more opportunity there is for evolution. The Red Queen hypothesis suggests that when in regard to parasite and host relationships, when parasites are low in number, the costs of sex outweigh the benefits and

Generally speaking, there are numerous issues related to genetic diversity which include mutations, sexual reproduction, migration, and population size.