• 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)

    (Curtis et al, 2004) Data is located within the Appendix. (Appendix Two) Several other studies have revealed that women report stronger feelings of disgust than men. (Journal of Psychophysiology, 2008) Differences between males and females reported and physiological disgust responses, such as their heart rate, electro dermal activity and other features listed previously.

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

    There was also not enough Vaseline to cover the stopper. Vaseline was used to seal the vial so that there will not be any leakage of water into the repirometer. However, it it's not sealed properly with Vaseline, water will enter into vial and oxygen and carbon dioxide will be

  1. Biology Industrial Melanism of Peppered Moth Lab

    Mean, standard deviation and T test of Melanic Moths on intermediate-coloured "tree bark" and dark-coloured "tree bark" Melanic Moths Mean Percentage of Trial 5 (%) S.D Signifance level ? Degrees of Freedom T Value Critical region Intermediate-Coloured "Tree Bark" 51.3 7.30 0.05 8 2.95 t ?

  2. Research Question (RQ) How does the position of the arm (cuff) in relation ...

    I noticed that all of the subjects appeared to struggle to hold their arm in the position required for this experimental test. It also appeared uncomfortable and difficult. The subjects stood with their shoulders back and their opposite hip to arm forward and their weight balanced on the foot of the monitored arm.

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

    Pick out seeds with the same or similar shape and size. Pick out twenty-five bean seeds and fifty sunflower seeds 9. For pots labelled "0", "2", "3" and "4", place one bean seed in the middle of the pots. According to the number on the pots, place that many number of sunflower seeds inside the pot surrounding the bean seed.

  2. cell theory summary

    2.1.4 Relative sizes of structure and unicellular organism We depend on the microscope for our observation of cellular structures. Observations of this time are for the most part dependable but we must consider the introduction of 'artifacts' by those processes that prepare the material for microscopy.

  1. How does the distribution of Plantago maior differ?

    10 15 1 4 16 2 6 9, on the grass 1 4 22 2 4 26 3 3 45 4 3 21 5 5 23 6 6 28 7 5 27 8 7 40 10, near the street 1 5 25 2 4 9 3 5 41 4 4

  2. IB Genetic Unit Notes

    Karyotyping, chromosomes are arranged in pairs according to their size and structure. 4.2.6: State that karyotyping is performed using cells collected by chorionic villus sampling or amniocentesis, for pre-natal diagnosis of chromosome abnormalities. Karyotyping is performed using cells collected by chorionic villus sampling or amniocentesis, for pre-natal diagnosis of chromosome abnormalities.

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