Sex Traits Essay

2342 words - 9 pages


Drosophila melanogaster were mated in labs 8, 11, and 13 to illustrate how the sex-linked genes are passed on from one generation to the next. This was accomplished by crossing different genotypes. In order to do this, the flies first had to be put to sleep, then counted under a dissecting scope and finally separated in to groups of red-eyed females, white-eyed females, red-eyed males, and white-eyed males. For the F1 a generation my results were 22 red-eyed males, 0 white-eyed males, 47 red-eyed females, and 0 white-eyed females. The expected ratio was 1:0:1:0, which was not far off from 1:0:1.2:0. The F1 b results are as follows: 0 red-eyed males, 20 white-eyed males, 37 red-eyed females, and 0 white-eyed females. The expected ratio was 0:1:1:0. The actual ratio was 0:1:1.7:0, this was a little farther off but I still accepted it. The results of the F2 a cross were 16 red-eyed males, 20 white-eyed males, 44 red-eyed females, and 0 white-eyed females. The excepted ratio was 1:1:2:0 which was exactly the same as the actual ratio, therefore I accepted it. Finally the F2 b cross results were 22 red-eyed males, 20 white-eyed males, 23 red-eyed females, and 15 white-eyed females. The expected ratio was 1:1:1:1 which is the same as actual ratio, thus I accepted it. Each time any part of this experiment was conducted all of the data was observed and recorded. The parental cross yielded the F1 generation and the F1 cross yielded the F2 genotypes and genotypes for both a and b, this was the goal of the over all experiment. All of the expected ratios and the actual ratios in this experiment were accurate.


The purpose of labs 8, 11, and 13 is to gexamine the genetic effects of sex-linkageh (Oaks, Engel, & Nelson). Genotypes and phenotypes were determined for the F1 and F2 generations (for each generation there were both an A and a B). The ultimate goal of these labs was to find the genotype and phenotype of the F2 generation.

Drosophila is used in this experiment to demonstrate genetics and evolution because they are easy to come by and have a short life span. gIt has only four chromosomes pairs: 3 pairs of autosomes and one pairs of sex chromosomes (XX female, XY male)h (Oaks, Engel, & Nelson 2002). Fruit flies lay their eggs in cracked produce where they hatch about twenty-four hours later. The eggs are .5 mm long and ghave two slender filaments near the head endh (North Carolina State University 2000). The cream colored maggots then eat the fruit in which they were hatched in until they are full grown, 5 mm long. This usually takes four days. Next the larva forms a yellowish-white pupa that is approximately 3 mm long. The pupa then turns into brown four days later and an adult fly emerges. The adult flyfs yellowish body is 3 mm long with dark bands. The female fly is ready to lay her eggs within two days. She lays about 500 eggs in all. For best...

Find Another Essay On Sex Traits

Sex-Role Stereotyping Essay

822 words - 3 pages role debate by suggesting such roles be thrown out entirely; they are essentially self-fulfilling prophecies. In her article, Gender Schema Theory: A cognitive account of sex-typing, she defines “sex typing” as the process of encouraging sex-specific skills, self-concepts and personality traits to males and females; i.e. how men become masculine and women become feminine. Sex typing has significant psychological effects on the individual and

Should Gay Marriage Be Legal? Essay

1041 words - 5 pages . A negative about same-sex couples adopting, is that the child of the couple will miss out on either a mother or father figure. A child adopted into the family of a same-sex couple will miss out on acquired traits passed down from a mother and/or father. A mother teaches one to clean and care for themselves and others, while a fatherly figure teaches one how to stand up for themselves against others. A gay couple may make fantastic fathers but

Perceived Erotic Value of Homosexuality and Sex-Role Attitudes as Mediators of Sex Differences in Heterosexual College Students'

6668 words - 27 pages the traditional pattern of sex roles, including lesbians and gay men. Research on gender-associated beliefs suggests that people's responses to others are based on an assumption that what is not feminine is masculine and vice versa. People expect others to fit into a relatively stable set of gender roles, traits, and physical attributes, generally believing, for example, that a person who is either masculine or feminine in one aspect of behavior is

Gay Marriage

887 words - 4 pages both a mother and a father, will provide characteristics and traits important to a child's upbringing. A mother can provide nurturing and warmth together with a father showing strength and discipline. Children should have the right to grow up in an appropriate environment, living in a well-balanced family, not in a world where same-sex marriages are acceptable and will ultimately promote and encourage homosexuality.Works CitedBecker, Amy B

Sex Discrimination

1571 words - 6 pages the likelihood that men and women will be treated differently. Stereotypes of People and Jobs Decisiveness, confidence, ambition, and recklessness are traits we expect to find in men, whereas warmth, sensitivity, understanding, dependence are stereotypically feminine traits. The stereotypes of some traits are so strongly sex-typed that traits viewed as positive in men, (e.g., assertiveness) may be viewed as negative for women. Similarly, traits

Do More Androgynous Self-Images Lead to Higher Levels of Moral Development?

1828 words - 8 pages Do More Androgynous Self-Images Lead to Higher Levels of Moral Development? Throughout our lives we undergo many developmental changes. Two developmental areas of interest are self image and moral development. As we move through the developmental stages, the way we interpret sex roles and our self-image according to those changes, as does the way we interpret moral dilemmas. There are several theories that claim different forms of development

Drosophila: Fruit Fly Lab

1600 words - 6 pages 50-50 chance of having a female or male.As stated earlier drosophila inherit sex chromosomes in the same way as humans. Traits controlled by genes located on sex chromosomes are called sex-linked traits. The alleles for sex-linked traits are written in superscripts of the X or Y chromosome. Because the X and Y-chromosomes are not homologous, the Y chromosome has no corresponding allele to one on the X chromosome and no superscript is used. Also

loveable winston

852 words - 4 pages Throughout 1984 so far, the reader has seen many unlikable traits that Winston possesses. Some of those traits include being violent, judgmental, and condescending. Despite having those traits Julia still chose Winston over the rest of the Party members. Winston has spent most of the book contradicting the Party and doing things behind their back. Winston is also similar to Julia in the fact that they both have a strong dislike for the Party

Homosexual Parenting

942 words - 4 pages An issue in today’s society is the “debate” on gay and lesbian parenting. Some people seem to think that the parenting styles between homosexuals and heterosexuals differ; are children affected by being raised in a homosexual parenting home? As same-sex couples are beginning to be able to be more open with their relationships because the world is becoming more accepting of the idea of the couples, same-sex parenting is starting to rise as well

'Sex' And 'gender' And The Relationship Between Them

1839 words - 8 pages . Traditionally, the word gender has been used to refer to the cultural aspect of what it is to be man or woman. ''Womanly' or 'manly' and 'masculine' or 'feminine' are viewed as not being connected with a person's biological sex, but more in terms of psychological characteristics shaped by individuals experience (EPoCH CD-ROM). The term sex is used solely when referring to biological and physical traits such as primary and secondary sex characteristics or

Understanding Human Sexual Behavior

2168 words - 9 pages disinhibited individuals engaging in more unrestricted sociosexual behaviour (Husted & Edwards, 1976). Considering this suggests the sex differences in sociosexuality could be associated with individual differences in certain personality traits. One personality trait that might be relevant to such sex differences is sensation seeking. Sensation seeking is a characteristic reflecting the desire to seek novel, intense and complex sensations

Similar Essays

Gender & Sex Worksheet Essay

498 words - 2 pages Title ABC/123 Version X PAGE \* MERGEFORMAT 1 Gender and Sex Worksheet ETH/125 Version 8 PAGE \* MERGEFORMAT 1 Associate Program MaterialGender and Sex WorksheetAnswer the following questions in 50 to 150 words each. Provide citations for all the sources you use.What is gender? What is sex in biological terms? Are gender and sex the same thing? Explain why or why not?Gender is complicated because it not only describes ones physical traits, but

Human Sexuality And Gender Differences Essay

1471 words - 6 pages a romantic partner, communication between the sexes can be improved. Improved communication leads to a more open forum and healthier relationships between the sexes. The sole source of information for this study was collected through the use of a survey. The survey was created specifically for this study and the questions were developed to be unbiased to sex and attractive. The survey listed 25 traits of both physical and non-physical

Psychological Androgyny Essay

869 words - 3 pages characteristics that are generally associated more with one sex or the other (Wiggins & Holzmuller, 1978). Some types of behaviors are more desired in one sex over the other. Beliefs about these traits may have an impact on expectations in relationships and, furthermore, satisfaction in these relationships. Sakalli-Ugurlu (2003) found that men scored higher on attitudes on women’s compliance in a relationship, whereas women scored higher on

Rehabilitation Of Sex Offenders Essay

1193 words - 5 pages other factors besides abuse that must be taken into consideration. A recent study on female sex offenders by Roe-Sepowitz and Krysik (2008) states, “the data reveal that many of the 118 female juvenile sex offenders came from chaotic and disorganized families and had poor parental supervision and serious school and mental health problems”. As Becerra-García, García-León and Egan (2012) discuss further, there are also personality traits that sex
Manisha Koirala | Parker Jotter SS Steel GT Gold Trim Ball Point Pen, Fine Nib, 0.8mm Blue Ink New | Rare Old Antique Collectible Boxwood Handwork Leopard Japanese Netsuke Statue