Contrast the Biological Differences between Heterosexual Males and Homosexual Males

Contrast the Biological Differences between Heterosexual Males and Homosexual Males Tavis Ryan King Introduction Discussion regarding the biological differences between heterosexual males and homosexual males is challenging. Unlike studying sexual differences between men and women, the contrasting points tend to be difficult to detect. However, research has discovered biological differences in the fields of biology, genetics, and psychology that could be indicative of differences. What is more difficult than finding these trends though, is explaining their aetiology. As a result, much of the discussion to explain biological differences goes back to the developmental causes of homosexual behaviour that are not yet solidly founded due to ethical (e.g. experimenting on a neonate) or technological limitations. Irrespective of this, the aim of this paper is to first explain how the development of heterosexual men and homosexual men differ based on the effects of hormones during neonatal development, brain development, genetic make-up and birth order. These four concepts are related and researchers from these approaches often cite one another in their studies. Lastly, sexually dimorphic patterns typically seen differentiating men and women also appear as a contrast between heterosexual men and homosexual men. These trends will be discussed but as their aetiology is also

  • Word count: 2815
  • Level: University Degree
  • Subject: Biological Sciences
Access this essay

Life cycle

Chapter 8 Objectives . Understand the concept of a life cycle as a repeating series of processes and phases from one generation to the next. 2. Describe binary fission in bacteria and distinguish the process from cell division in eukaryotes. 3. Outline the general progression and overall results of meiosis and contrast them with the process of mitosis. 4. Explain the ways that meiosis provides possibilities for genetic recombination i.e. independent orientation of chromosomes, random fertilization and crossing over. 5. Understand that crossing over during prophase I produces new combination of genes. Tetrads are formed during prophase I. 6. Name the factors controlling cells growth. 7. Explain the way meiosis provides possibilities for genetic recombination. I. Introduction. A life cycle is the sequence of life forms (and the processes forming them) from one generation to the next. . Sexual reproduction involves passing traits from two parents to the next generation. 2 . Asexual reproduction involves passing traits from only one parent to the next generation. 3 . Cell division is the basis of all of the processes (developmental or reproductive) that link the phases in a life cycle. II. Connections Between Cell Division and Reproduction. A. Like begets (forms) like. (a dog with reproduce forming an likeness of him/her self). . This is strictly true

  • Word count: 2261
  • Level: University Degree
  • Subject: Biological Sciences
Access this essay

Is there a genetic link of alcoholism?

Is there a genetic link of alcoholism? Humans are one of the most complex species on the planet there are millions of cells with the human body. Each cell contains 23 pairs of chromosomes made up of a substance called DNA within DNA is where you will find genes. Genes are the structures which combine together to make us what we are, 'Genetic information directs cellular function, determines an organism's external appearance, and serves as the link between the generations in every species' (Cummings. K, 1997, 8) [1] Different combinations of genes are what make us individual and different from previous generations. These different combinations are produced when reproduction occurs. Part of this process is meiosis 'The process in gametogenesis or sporogenisis during which one replication of the chromosomes is followed by two nuclear divisions to produce four haploid cells' (Cummings M R & Klug W S, 1997, B11) [2] In other words: a set of chromosomes is replicated and then the two sets of 46 chromosomes (2 diploid cells) are separated into four sets of 23 (four haploid cells) After the nuclear division of a set of chromosomes has taken place 2 sperm/ovum are created so that 23 of the person's chromosomes can be passed on to their offspring. However meiosis is made much more complicated by a processed called crossing over; this means that the chromosomes can be broken up

  • Word count: 1506
  • Level: University Degree
  • Subject: Biological Sciences
Access this essay

SERUM LIPID PROFILE

A SEMINAR ON SERUM LIPID PROFILE DURING PREGNANCY PRESENTED BY ANJORIN SEUN STEPHEN MAT NO: BMS0700993 DEPARTMENT OF PHYSIOLOGY FACULTY OF BASIC MEDICAL SCIENCES COLLEGE OF MEDICAL SCIENCES UNIVERSITY OF BENIN SUPERVISED BY: DR (MRS) M.I EBOMOYI SEPTEMBER, 2011 SUMMARY During pregnancy, women undergo many physiological changes which are entirely normal including cardiovascular, hematologic, metabolic, renal and respiratory changes that become very important in the event of complications. These changes in physiological and homeostatic mechanisms during pregnancy are to ensure the fetus is well provided for. Pregnancy has being found to be associated with changes in lipid profile (Total cholesterol TC, Low-Density lipoprotein LDL, Triaclylglycerol TAG and High-Density lipoprotein HDL) and this differs with each trimester Some previous studies had showed that the most dramatic change in the lipid profile in normal pregnancy is serum hypertriglyceridemia, which may be as high as two to three folds in the third trimester over the levels in non pregnant women (Idonije et al., 2011; Chiang et al., 1995). The major physiologic function of the increase in the maternal lipid profile during pregnancy especially in the third trimester is in response to the maternal switch from carbohydrate to fat metabolism which is an

  • Word count: 3694
  • Level: University Degree
  • Subject: Biological Sciences
Access this essay