• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

IB Genetic Lab

Extracts from this document...

Introduction

Genetics Lab Purpose The purpose of this experiment is to investigate the relationship between the length of arm span in centimeters, measured from the tip of the middle finger on the left hand to the tip of the middle finger on the right hand, and height in centimeters, measured from the bottom of the female's feet to the top of her head, of females from age 5 to 50 using a measuring tape. Hypothesis The length of the arm span measured in centimeters will equal or will be similar to the height measured in centimeters in females of any age. This will mean that there will be no significant difference between the two means of length of arm span and height. The arm span is often used to predict the height of males and females, and previous studies have been done to illustrate that there is an association between arm span measurement and height in all groups.1 Hence the length of arm span and height in females from age 5 to 50 will be similar or the same. Variables The independent variables are the phenotype; arm span of females of age 5 to 50 in centimeters, which is measured from the tip of the middle finger on the left hand to the tip of the middle finger on the right hand, and height of females of age 5 to 50 in centimeters, which is measured from the bottom of the female's feet to the top of her head. ...read more.

Middle

(� 0.1cm) Range of values (� 0.1cm) Standard deviation (s) t-value (t) Degrees of freedom (df) Critical value for P = 0.05 Arm-span 32 160.0 185.0 - 110.0 17.6 6.9 x 10-2 62 2.308 height 32 159.0 182.0 -112.0 16.9 Figure 2: The mean length of arm-span and height of females from age 5 to 50 in centimeters collected from personal surveys Conclusion When comparing the two means, 160.0cm and 159.0cm, as shown in Table 2 and Figure 2, there are no significant difference between the two means as hypothesized. This is supported by the fact that the t-value, which is 6.9 x 10-2, is smaller than the critical value at p=0.05, which is 2.308, as displayed in Table 1. Table 2 and Figure 2 that display the mean length of arm span and height, which are 160.0cm, and 159.0cm, respectively, indicate that the two values only differ by 1.0cm, which clearly demonstrate that there is no significant difference between the two data. Also in Figure 2, the two bars, which represent the mean length of arm span and height of females from age 5 to 50, barely depict any significant differences. This supports the hypothesis, which was that the length of arm span will be similar. The recorded values of arms span and height in Table 1 also support the hypothesis, for example, 170.0cm measured for the arm-length, which is very close to the value of 170.1cm recorded for height. ...read more.

Conclusion

measuring tape more accurately, and to ensure that the number on the measuring tape is parallel to the top of the head, and also ensuring that no extra height has been added with hair. This will improve the collection of accurate data in the investigation. Student's t-Test: Results The results of an unpaired t-test performed at 21:14 on 3-JUN-2008 t= 0.695E-01 sdev= 17.3 degrees of freedom = 62 The probability of this result, assuming the null hypothesis, is 0.945 Group A: Number of items= 32 110. 126. 129. 132. 134. 145. 148. 154. 155. 155. 155. 157. 162. 162. 164. 164. 166. 168. 168. 168. 169. 169. 169. 170. 170. 170. 171. 172. 180. 181. 182. 184. Mean = 160. 95% confidence interval for Mean: 153.5 thru 165.7 Standard Deviation = 17.6 Hi = 184. Low = 110. Median = 165. Average Absolute Deviation from Median = 12.7 Group B: Number of items= 32 112. 127. 129. 133. 134. 144. 153. 153. 154. 154. 155. 157. 160. 160. 161. 163. 163. 167. 167. 168. 168. 169. 169. 170. 170. 170. 171. 173. 180. 180. 181. 182. Mean = 159. 95% confidence interval for Mean: 153.2 thru 165.4 Standard Deviation = 16.9 Hi = 182. Low = 112. Median = 163. Average Absolute Deviation from Median = 12.4 1 "PubMed", NCBI, http://www.ncbi.nlm.nih.gov/pubmed/8793422. 2 "PubMed", NCBI, http://www.ncbi.nlm.nih.gov/pubmed/8793422. ?? ?? ?? ?? ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our International Baccalaureate Biology section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related International Baccalaureate Biology essays

  1. Marked by a teacher

    Neurology and Behaviour. Focus question: Is there an increase in the perception and ...

    5 star(s)

    No music and lighting should remain the same. Position of participants When tested the participants will be seated in the same seat to view the image on the desk before them. Control used for comparison - The design of this experiment does not allow for any control to be used for comparison.

  2. Transpiration Investigation

    1314 1011 1163 390 98.8 95.6 97.2 1313 973 1143 400 98.7 95.6 97.2 1312 979 1146 410 98.7 95.5 97.1 1319 997 1158 420 98.7 95.5 97.1 1326 997 1161 430 98.6 95.4 97.0 1327 985 1156 440 98.6 95.3 96.9 1329 985 1157 450 98.6 95.3 96.9 1328

  1. IB Genetic Unit Notes

    Telophase II The chromatids (now called chromosomes) decondense. The nuclear membrane re-forms. The cells divide. 10.1.2: Outline the formation of chiasmata in the process of crossing over. 1. Homologous chromosomes commencing pairing to form a bivalent as they continue to shorten and thicken by coiling. 2. Breakages occur in parallel non-sister chromatids at identical points.

  2. Bio lab - Oxygen Consumption in germinating and non-germinating seeds

    5 0.03 0.06 0.03 0.04 0.01 10 0.03 0.12 0.09 0.07 0.04 15 0.04 0.13 0.09 0.10 0.06 20 0.05 0.17 0.12 0.12 0.07 25 0.05 0.18 0.13 0.14 0.09 30 0.06 0.22 0.16 0.15 0.09 Processed Table 7: The volume of oxygen consumption in each 1.0 ml pipettes in room temperature water.

  1. Allelopathy. Open Investigation Will increasing the number of allelopathic sunflower plants effect the ...

    Wear on gloves 2. Measure 15mm starting from the head of the lid of the ball point pen, then draw a line all around the pencil at the 15mm point (refer to IV.Appendix to see how the pen was marked).

  2. Biology independent investigation, Ecology

    Replications Controlled variable 5 replications are done to reduce random error. Lighting Controlled variable Seeds to be kept in direct sunlight. If cloud cover is present a UV lamp will be used. Wind Controlled variable The seeds will be kept inside to avoid wind interference Pest control Controlled variable Seeds

  1. Extended Essay: An Investigation Into the Differences In Life Expectancy For Males and Females ...

    Pneumococcus bacteria which can cause fatal diseases such as pneumonia and Toxic Shock Syndrome. Another antibiotic, streptomycin was developed by Selman A. Waksman in 1943 is effective against a number of different bacteria including strains which are resistant to Penicillin, and is often used (in conjunction with other antibiotics)

  2. Biotechnology Assignment: Genetic Screening/Testing

    Predictive testing can identify mutations that increase a person's chances of developing disorders with a genetic basis, such as certain types of cancer. 3. Presymptomatic testing can determine whether a person will develop a genetic disorder before any signs or symptoms appear.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work