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Santiago Callejas Cherish Centeno Romina Chanduvi Aileen Perez.

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Presentation on theme: "Santiago Callejas Cherish Centeno Romina Chanduvi Aileen Perez."— Presentation transcript:

1 Santiago Callejas Cherish Centeno Romina Chanduvi Aileen Perez

2 Since, dominant traits have “supremacy” over recessive traits, we have created and conducted surveys that establishes whether dominant traits are more common than recessive traits in the Miami-Dade College Wolfson Campus student population.

3 If dominant traits prevail over recessive traits, then dominant traits should be more “commonly” found in Miami Dade’s College student population.

4 Researched: What are human traits? Where do they come from? Mendelian Genetics Dominant VS Recessive -Sex linked traits - “Shuffling the deck” Types of inherited human traits -”

5 The genetically determined characteristic or condition of an individual. These characteristics are controlled by one or more genes. Most genes have two or more variations, called alleles. For instance, the gene for hairline shape has two alleles – widow’s peak or straight. An individual may inherit two identical or two different alleles. Straight Hairline Widow’s Peak Hairline The eye color gene, also has more than one variation.

6 Physical traits that are observable characteristics determined by specific segments of DNA called genes. Multiple genes are grouped together to form chromosomes, which reside in the nucleus of the cell. Every cell (except eggs and sperm) in an individual's body contains two copies of each gene. This is due to the fact that both mother and father contribute a copy at the time of conception.  This original genetic material is copied each time a cell divides so that all cells contain the same DNA. Genes store the information needed for the cell to assemble proteins, which eventually yield specific physical traits.

7 He established 2 possible "alleles" for each trait. The combination was (1 from mom, 1 from dad) which is called your "genotype" There are more than 2 alleles for some traits. Most traits, in fact, are affected by more than 1 gene Mendel studied traits & how they are passed on to offspring Gregor Mendel ( )

8 Dominant Gene: is expressed in a person who has only one copy of that gene 2 Different Allele -In heterozygous individuals, the allele that is expressed is the “dominant” allele. Recessive Gene: is expressed only when two copies of the gene are present 2 Matching Allele -In homozygous individuals, The allele that is expressed is either the “recessive” allele or the “dominant” allele.

9 In the case of genes located on the X chromosome, females would have the usual 2 alleles for each gene but males only have 1 X chromosome and thus 1 allele (the Y chromosome contains only a small number of genes related to gender)

10 Chromosomes of offspring don’t have a half that’s clearly from dad and a half that's from mom. During duplication there is "crossing over" of bits of each half.

11 TraitDominantRecessive HairlineWidow’s peak hairline Straight hairline Dimples No dimples EarlobesDetached EarlobeAttached Earlobe Freckles No freckles TongueRollerNo roller ThumbStraight thumbhitch-hikers thumb

12 Recessive Traits -Straight hairline -No dimples -Attached Earlobe -No roller -hitch-hikers thumb Dominant Traits -Window’s peak hairline -Dimples -Free ear lobe -Roller -Straight thumb Miami- Dade Wolfson Campus Determining Factors: Race, gender and writing hand

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17 Hitch-HikersStraight

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19 DominantRecessive Straight HairlineAttached earlobe Straight ThumbNo Dimples Tongue roller Results show that our hypothesis was indeed correct. They are more people within the population who express dominant traits rather than recessive traits. However, our studies also revealed that there are many among the population that display recessive traits.

20 1. Name a leading recessive trait found in the Miami-Dade student population. A. Freckles B. Dimples C. Tongue roller D. Attached earlobe 2. Is tongue rolling a dominant or recessive trait? 3. Who is going to get an A for the presentation A. Human traits group B. Human traits group C. Human traits group D. Human trait group

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