Genetics excercise

raven · Oct 15, 2008 2:56 PM

Just an interesting exercise about genes (DNA) I thought I’d post up.
These are some easily-seen characteristics that are different from person to person. The characteristics you have will depends on what genes you got from your mum and dad.
Your gene combinations (which makes up your characteristics) can be either Dominant or Recessive. Dominant gene combinations occur about 75% of the time and Recessive gene combinations occur about 25% of the time. (it’s actually a lot more complicated, but for the sake of keeping it simple I’ll leave it at that).

1. Tongue rolling
Try and roll your tongue into a U shape. Can you do it?
a.) I can roll my tongue. (Dominant)
b.) I cannot roll my tongue. (Recessive)

2. Hitchhiker’s thumb
Hold out your hand and clench it into a fist with the thumb sticking out. Bend the thumb back as far as possible(In other words, make a ‘thumbs up’ sign with your hand, but bend your thumb back as far as possible without grabbing and forcing it with your other hand.) Is your thumb bent or straight?
a.) Straight thumb. (Dominant)
b.) Bent thumb. (Recessive)
hitchiker%20thumb.jpg

3. Widow’s peak
Look at your hairline that runs along your forehead (the boundary between your face skin and your hair). Do you have a Widow’s peak (a V shaped dip in the hairline) or a straight hairline?
a.) Widow’s peak. (Dominant)
b.) A straight hairline. (Recessive)
widow%27s%20peak.jpg

4. Hand clasping
Clasp your hands together, interlocking your fingers. Which thumb happens to be on top?
a.) Left thumb is on top when hands are clasped. (Dominant)
b.) Right thumb is on top when hands are clasped. (Recessive)

5. Bent little finger
Hold your hand up in front of you, as shown in the picture. Does your little finger stay straight or bend a little?
a.) Straight little finger. (Recessive)
b.) Bent little finger. (Dominant)
bent%20little%20finger.jpg

6. Finger hair
Each of your fingers are made up of three segments, which are divided by joints. On the middle segment of any of your fingers, is there hair present?
a.) Hair present on middle segment of finger. (Dominant)
b.) No hair present on middle segment of finger. (Recessive)
(No image available. Got too slack to find one.)

7. Dimpled chin
Is your chin dimpled (is there a cleft present) or smooth?
a.) Dimpled chin. (Dominant)
b.) Smooth chin. (Recessive)
cleft%20chin.jpg

8. Ear lobe
Is the lobe (bottom part) of your ear attached to the side of your face or hanging loose?
a.) Ear lobe is attached. (Recessive)
b.) Ear lobe is hanging free. (Dominant)
Free%20and%20attached.jpg

9. Hair swirl (whorl)
On the very top of your head, there should be an area where the hair swirls around like a snail shell. Does your hair swirl clockwise or anticlockwise? Remember, if looking in a mirror, that mirrors make it look like it spins the opposite way to what it really does.
a.) Hair swirls clockwise. (Dominant)
b.) Hair swirls anticlockwise. (Recessive)

10. Freckles.
Do you have any freckles on your skin? (regardless of whether it’s just a few or lots).
a.) Freckles present. (Dominant)
b.) No freckles present. (Recessive)

raven · Oct 15, 2008 3:06 PM

My answers. (sorry to double post, I just thought it would look neater to have the questionnaire and my answers separate).

1. b.) I cannot roll my tongue. (Recessive)
2. b.) Bent thumb. (Recessive)
3. b.) A straight hairline. (Recessive)
4. b.) Right thumb is on top when hands are clasped. (Recessive)
5. a.) Straight little finger. (Recessive)
6. a.) Hair present on middle segment of finger. (Dominant)
7. b.) Smooth chin. (Recessive)
8. b.) Ear lobe is hanging free. (Dominant)
9. a.) Hair swirls clockwise. (Dominant)
10. b.) No freckles present. (Recessive)

Phoenix_Flyer · Oct 15, 2008 6:37 PM

Here's mine:

1) a) I can roll my tongue (Dominant)
2) b) Bent thumb (Recessive)
3) b) Straight hairline (Recessive)
4) b) Right thumb on top (Recessive)
5) b) Bent little finger (Dominant)
6) a) Hair present on middle finger sections (Dominant) - I have fair hair though so I had to look hard! lol
7) b) Dimpled chin (Dominant)
8) b) Ear lobe hanging free (Dominant)
9) Errr.... I have long hair, so I have no idea how to tell that one...
10) a) Freckles present (Dominant)

A Guy · Oct 15, 2008 7:09 PM

1. I can roll my tongue. (Dominant)
2. Bent thumb. (Recessive)
3. Widow’s peak. (Dominant)
4. Left thumb is on top when hands are clasped. (Dominant)
5. Straight little finger. (Recessive)
6. No hair present on middle segment of finger. (Recessive)
7. Smooth chin. (Recessive)
8. Ear lobe is hanging free. (Dominant)
9. My hair doesn't swirl in any direction...
10. No freckles present. (Recessive)

Phoenix_Flyer · Oct 15, 2008 7:13 PM

Yup, that hair one is hard unless your a lad. Though, it must be hard for some lads as well. Only other people can really tell what direction your hair swirls in.

DragonWithinMe · Oct 15, 2008 9:05 PM

My results:

1. I can roll my tongue (Dominant)
2. Straight thumb (Dominant)
3. Straight hairline (Recessive)
4. Left thumb on top (Dominant)
5. Bent little finger (Dominant)
6. No hair presenting. (Recessive)
7. Smooth chin (Recessive)
8. Hanging free (Dominant)
9. How can I say? I have 3 hair swirls. (Not joking)
10. No freckles. (Recessive)

Paranoia · Oct 15, 2008 11:48 PM

Here's Mine:

1.) I can roll my tongue. (Dominant)
2.) Straight thumb. (Dominant)
3.) A straight hairline. (Recessive)
4.) Left thumb is on top when hands are clasped. (Dominant)
5.) Straight little finger. (Recessive)
6.) No Hair present on middle segment of finger. (Recessive)
7.) Dimpled chin. (Dominant)
8.) Ear lobe is hanging free. (Dominant)
9.) I don't see any swirling. (XD)
10.) No freckles present. (Recessive)

Spyro_Loves_Me · Oct 16, 2008 4:48 AM

Ooh, I remember doing something like this in Biology. Here I go ...

1. Can roll tongue - D
2. Straight thumb - D
3. Straight hairline - R
4. Right on top - R
5. Straight little finger - R
6. No hair on middle segment - R
7. Smooth chin - R
8. Ear lobe attached - R
9. Hair swirls clockwise (but I can change that :-P) - D
10. No freckles - R
11. Oh. There is no 11. yikes

raven · Oct 16, 2008 5:05 AM

@ Spyro_Loves_Me: There was going to be an 11th question (there's loads and loads of little gene comparison questions, just google "gene widow's peak" or something like that), but it was 1:00am when I finished it, I was kinda too tired to do any more questions.

The 11th question was perhaps going to be something like this:
"Turn your hand around so the palm is facing your eyes. Clench your hand into a fist. Examine the tendons that appear on the underside of your wrist (they look like ropes running underneath your skin). If you have three tendons, then you have the long palmar muscle. If you only have two tendons, you don't have the long palmar muscle. Be sure to check both wrists"

@ Phoenix_Flyer and everyone else: I know right XD my hair was just shooting in any and all directions. I just took a picture of the top of my head and looked at the photo and kinda guessed.

#1 Oct 15, 2008 2:56 PM

Genetics excercise

#2 Oct 15, 2008 3:06 PM

Re: Genetics excercise

#3 Oct 15, 2008 6:37 PM

Re: Genetics excercise

#4 Oct 15, 2008 7:09 PM

Re: Genetics excercise

#5 Oct 15, 2008 7:13 PM

Re: Genetics excercise

#6 Oct 15, 2008 9:05 PM

Re: Genetics excercise

#7 Oct 15, 2008 11:48 PM

Re: Genetics excercise

#8 Oct 16, 2008 4:48 AM

Re: Genetics excercise

#9 Oct 16, 2008 5:05 AM

Re: Genetics excercise

Board footer