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Lesson 03.03 Mendel

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Mona Alqutub

on 23 June 2014

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Transcript of Lesson 03.03 Mendel

Questions
Data
Lesson 03.03 Mendel

observations
Observations:
Record the traits of each member of the family (parents and offspring) that you surveyed. Add more rows to the table for additional offspring as needed
Calculations
Calculations:
Calculate the percentages for each trait in your total sample and list those percentages in this section of your assignment.

Example calculation: (12 people with widow’s peaks ÷ 20 total people) × 100 = 60% widow’s peaks

Members 12-20
Survey at least 20 people to find out what traits they have for each of the features below. Tally the numbers for each trait and record those totals in each column.

When completing the survey, be sure to include yourself as one of the individuals surveyed. Also include at least one set of parents and offspring in the individuals you survey. Document the features of each member of the family you surveyed within the data table, but also make a special note of these features in the observation section of your report. This information will be important when writing your conclusion.

◾Identify the trait that you believe to be dominant for each of the features surveyed. Explain your reasoning.
the free ear lops were the dominant trait featured, i believe that because maby the cousins depending on the genes for each persons.
◾What recessive features do you exhibit? Do you have any relatives who exhibit those same features?
we all have the same color and eyes, but we don't have the same hair texture because my dad has curly hair and my mom has straight.
◾In the family you surveyed, what features did the offspring share with one or both parents?
Were there any features that the offspring exhibited that were not exhibited by either parent?
no.
◾How is it possible for an offspring to exhibit a recessive trait if neither parent exhibited that recessive trait? What must be true about the parents’ genes for this to occur?
it could be the grand parents to have this gene.
◾Are there any results in your data that surprised you?
not really
◾It is possible that a recessive trait in a survey such as this one may have a greater total number than its dominant counterpart. Explain how that might happen in an investigation like this.
◾How might surveying a different number of people or different population of people possibly change the percentages that you calculated?

100%
90%
30%
30%
10%
20
100%
90%
30%
30%
10%
20%
20
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10
5
family 1 & 2
6-20
no
no

no

yes
yes

yes
straight
straight

straight
straight
straight

straight
no

no
no
yes

no
yes
yes

no
yes
yes

no
no
straight
straight

straight

yes
no

no
no
no
no
yes
no
no
widows
widow
widows
straight
straight
straight

no
no
no
yes
yes
yes

yes
no
yes
no
yes
yes
straight
curly
curly
no
no
no
no
no
no

no
no

no
widows
widows
widows
straight
straight
straight
no
no
no
yes
no
yes
yes'
no

no
widows
no

widows
straight
straight
straight

no
no
no
yes
yes

yes
yes
no

yes
widows

no
no
straight

straight
straight
no
no

no
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