Human Genetics
Although we humans are fantastically made, are quite complex, and our traits are often coded by many genes, some traits are coded by single gene pairs. The following table is a survey to help you determine your genotype, based on phenotype traits. Keep in mind the terms homozygous dominant (AA) will have the dominant trait, homozygous recessive (aa) will have the recessive trait, and heterozygous (Aa) will have the dominant trait. If you have the dominant trait, you will likely not be able to determine if you are homozygous dominant or heterozygous, unless you know what traits your parents have, so you will circle “RR or Rr” if you are dominant for the first trait, for example, because you can’t know if you are RR or Rr for sure.
Fill in the chart provided and then survey a minimum of 6 people (unrelated if possible) and find out the total who are dominant and recessive for the trait.
A. Look at the phenotypic trait and description (use human
traits document)
B. Decide if you express the trait and fill in the dominant or
recessive box
Trait Description |
Phenotype (please circle only one row) |
Genotype (please circle only one row) |
I am (Dominant or Recessive) |
# of people Dominant |
# of people Recessive |
Tongue rolling (ability to roll tongue) |
Roller Non-Roller |
RR or Rr rr |
|||
Bent little fingers (last portion of the pinky bent inward towards other fingers) |
Bent pinky Straight pinky |
BB or Bb bb |
|||
Widow’s peak (peak in the forehead hairline) |
Present Absent |
WW or Ww ww |
Hitchhiker’s Thumb (ability to hyper extend the thumb) |
Present Absent |
HH or Hh hh |
|||
Hand clasping, left over right thumb |
Left on top Right on top |
LL or Ll ll |
|||
Freckles |
Present Absent |
FF or Ff ff |
|||
Free earlobe (either attached to side of head or dangle free, see diagram) |
Free Attached |
HH or Hh hh |
|||
Chin cleft (dimple in middle of chin |
Present Absent |
CC or Cc cc |
|||
Hair on middle joints of fingers (Hairs present between the first and last finger joints) |
Present Absent |
HH or Hh hh |
|||
Short second finger (ring finger shorter than pointer finger—note, ring finger short in males is dominant, in females recessive) |
Ring finger shorter Ring finger longer |
SS or Ss ss |
|||
Dimples (dimples in one or both cheeks) |
Dimples Present Dimples Absent |
DD or Dd dd |
|||
Eye Color (blue?) |
Other than blue blue |
BB or Bb bb |
|||
Blue eyes: When a person is homozygous for a recessive gene no pigment is deposited in the from part of the eye and a blue layer at the back of the iris shows through. A dominant gene, allows pigment to be deposited which masks the blue color. Other genes are responsible for the type and amount of this pigment leading to various shades of brown, hazel, green and other colors.
Please help me fill out this chart. Thank you!
Hey, welcome to Chegg. I hope my answer will be of some help to you. Thank you!
Human Genetics Although we humans are fantastically made, are quite complex, and our traits are often...
Using the following information below, fill out Table 1 for you. PTC: taster (T-), non-taster (tt) Sodium benzoate: taster (B-), non-taster (bb) Hair type: Is your hair naturally wavy (CC), wavy (Cc), or straight (cc)? Hair color: Dark hair (DD or Dd) is dominant over light colored hair (dd) Widow's peak: the presence of a window's peak is dominant (WW or Ww) over absent (ww) Eyebrows: bushy (BB or Bb) dominant over fine (bb) Eye color: non-blue (EE or Ee)...
Questions
Example: to find the probability of a person having light
colored eyes (bb) and having the ability to roll their tongue (RR
or Rr), multiply the probabilities of those traits
0.09 x 0.71 = 0.0639
Next multiply by 100 to change the number into a percent
0.0639 x 100 = 6.30% chance of finding a person in this class
with those two traits.
1.Using your class as a representative population, what is the
probability of finding a person who...
Observing human phenotypes and probability in genetics Name: _________________________ Purpose Reinforce concepts of simple genetics by examining the following: Genotype Phenotype Homozygous Heterozygous Dominant Recessive Materials Mirror Objectives Determine your phenotype for ten different traits. Determine your possible genotypes for the ten different traits. Evaluate your uniqueness as an individual. Part A- Determining your phenotype and genotype In part “A” you will examine your phenotype, or appearance, and will draw conclusions about your genotype, the gene combinations that determine appearance....
CA inf со w Construct a personal record of your phenotype and possible genotypes for the traits condition, you will know with certainty your genotype (...hh). If your phenotype is the dominant condition, you may not know if you are homozygous dominant of heterozygous. If you don't know about your parents or children-Just indicate you could be either by recording both the homozygous dominant and heterorygous genotype (i.e., HH, Hh) TRAIT Your Phenotype Your Genotype Dimple Chin D-Dimples d-no dimples...
Traits Symbol Dominant S Phenotype Dd Dimples Your phenotype Your genotype 1. Facial dimples Bent little finger 2. Bent little finger 3. Eye Color Brown eyes 4. Free ear lobe E, e Fif H, Free ear lobe 5. Mid-digital hair Presence of hair 6. Hand clasping Left on top 7. Widow's peak Widow's peak Ww Tit 8. Tongue Rolling Tongue roll sc Cleft in chin 9. Chin cleft 10. Hitchhiker's Thumb 11. Handedness Straight (180) Hih RT Right 12. Finger...
Traits Symbol Dominant Phenotype od Dimples Your phenotype Your genotype $ 1. Facial dimples 2. Bent little finger 3. Eye Color Bent little finger Brown eyes 4. Free ear lobe E, e F.f Hih Free ear lobe 5. Mid-digital hair Presence of hair 6. Hand clasping Left on top 7. Widow's peak Widow's peak Ww Tt 8. Tongue Rolling Tongue roll се Cleft in chin 9. Chin cleft 10. Hitchhiker's Thumb 11. Handedness Hi, Straight (180" RT Right 12. Finger...
Human Mendelian Traits Like most complex organisms, humans possess an enormous number of genetically inherited characteristics. Some of these are Mendelian in nature, i.e., one gene with two alleles (one true dominant, one true recessive) producing two easily observed traits. You and your partner will evaluate yourselves and each other for your phenotypes, then list the appropriate genotype possibilities. If you are dominant for the trait then assume you are heterozygous unless you know your parents phenotype. 1. Rolling the...
i need some help with this lab ASAP please!
HUMAN GENETICS It to study because of the relatively long life span and the limited number In addition, the number of chromosome pairs (23) increases the possible number of genetic combinations. It is possible, however, to take a sample from human frequency of a trait and the possible ways a given trait is inherited. populations to estimate the Objectives .Investigate the inheritance of some human traits. Estimate the frequency of selected...
Human Mendelian Traits Mendelian Traits are those traits which follow Mendel's rules of only 2 possible versions of a gene(1 dominant, 1 recessive). There are only a few examples of this in humans. 1. Circle the heterozygous dominant genotypes: AA Aa aa YyYY W Re RR 2. Circle the homozygous recessive genotypes: AA Aa aa YyYY V ir Rr RR 3. Use the chart below to determine your phenotype (observable characteristic) and possible genotype(s) (a pair or pairs of alleles)....
Match the following terms with the appropriate description
below:
a. alleles b. autosomes c. dominant allele d. genotype e.
heterozygous f. homozygote g. phenotype h. recessive allele i. sex
chromosomes
1. ________________ genetic make-up
2. ________________ how genetic make-up is expressed
3. ________________ chromosomes that dictate most body
characteristics
4. ________________ alternative forms of the same gene
5. ___________an individual bearing two alleles that are the same
for a particular trait 6. ________________ an allele that is
expressed, whether in...