Question

HELP ON A LAB U WILL SEE THE ATTACHMENT..that i have posted

Answer 1

so we did this thing with beans where we would pair them one by one without looking...

Answer 2

Yeah, I think I understand the lab.

And I think that the factor that determines which beans you pick...is chance.

Answer 3

We have the red beans, and the white beans, right there. And we pick them without looking. So...wouldn't chance/probability be the only factor that decides which beans we pick?

Answer 4

You already know that the beans represent alleles.

Answer 5

ohh ok

Answer 6

so probabillity

Answer 7

I mean...the title of the lab is...."How Does Chance Influence Inheritence?"

Soooo, it makes sense to me. "Chance." Or "probability."

Answer 8

ill put probability

Answer 9

wait which one r u talking about?

Answer 10

number 1?

Answer 11

#4

Answer 12

and number 1 is alleles

Answer 13

right?

Answer 14

Yes, looks like it to me.

Answer 15

i dont get number 2

Answer 16

and number 3 is three

Answer 17

right?

Answer 18

Yes, #3 is three.

Answer 19

I'm looking at #2. I'm thinking.

Answer 20

ok

Answer 21

I'll be back. I'm still thinking!

Answer 22

kk

Answer 23

hurry cuz i have a back side too

Answer 24

I have no idea why we ought to only pick out one bean from each box at a time.

Because in real life, genetic inheritance is determined by many alleles. Lots of alleles.

Answer 25

ugh i dont knoww.....

Answer 26

Me neither. I SHOULD know. I'm ashamed.

I'm gonna research the law of segregation. I wish I had the textbook you use.

Answer 27

oh i have it but i dont know what to loook up

Answer 28

Oh I just found something.

For #2 on the front.

The Law of Segregation says that organisms inherit TWO alleles for every trait.
One from each parent.

That's why only one bean must be chosen from each container.

Answer 29

What do they mean by "inferred ratio"? Do you know?

Answer 30

like u just divide it by the smallest number..hold on

Answer 31

I don't think #8 is 50%.

It's asking us...what are the chances that we would pick a pair of beans, where both beans are the same color?

There are three pairs that we COULD pick:

Red Red,
White White,
Red White.

2 out of those 3 pairs would have both beans be the same color.

And 2 out of 3 is about 66.6%. Right?

Answer 32

I was WRONG

Answer 33

Don't listen to me. I just made the punnett square. It really is 50%.

Answer 34

ohk whew

Answer 35

But then wouldn't #9 also be 50%?

Answer 36

do u see anything else thats wrong?

Answer 37

isnt it 25?

Answer 38

wait no i just guessed

Answer 39

You can either pick the SAME colored beans,
or OPPOSITE colored beans.

So, if there's a 50% chance of picking the SAME colored beans,
wouldn't there have to be a 50% chance of picking OPPOSITE colored beans?

Answer 40

yeah

Answer 41

The punnett square that I drew for myself shows me that there's a 50% of picking one Red, and one White.

Answer 42

ohkk

Answer 43

Hey...there's something interesting.

Answer 44

huh

Answer 45

I'm looking at question #7.
Why was it important to select so many pairs?

You know how when we make a punnett square,
we find that the probability of picking the SAME colored beans should be 50%?

Answer 46

yeah

Answer 47

so thats the answer

Answer 48

Not for #7.

Answer 49

I'm just saying, the chances of picking out two SAME colored beans should be 50%. And that is a true fact.

But at the end of your experiment, you ended up picking the same colored beans 55.38% of the time. A little higher than chance.

Answer 50

Hold that thought.

Answer 51

ok....

Answer 52

I think I'm onto the answer for #7.

Let's look at the percentage of times that you picked the same colored beans, in each trial.

Trial 1 -- 60.71%

Trial 2 -- 56.76%

Trial 3 -- 56.66%

Trial 4 -- 48.57%

Answer 53

Now, the punnett square tells us that the percentage SHOULD be 50%. Right?

But you see how every trial's percentage is so different?

Answer 54

yes

Answer 55

i still cant figure out what the answer would be...

Answer 56

Yes. Now, at the END of all your trials, you ended up having picked two of the SAME colored beans....55.38% of the time.

That's closer to 50% than nearly any of the trials, separately.

Answer 57

so...# 7 the answer would be....

Answer 58

The more times you pick bean pairs, the closer you get to matching the probability of the punnett square.

Answer 59

So....I think the answer is that .....

It was necessary to have selected so many pairs, so that we could better understand that chance isn't always precise, in genetic inheritance.

Answer 60

You see? The punnett square tells us that the chance of picking two of the SAME colored beans SHOULD be 50%.

But look at the lab. We NEVER got 50%.

Chance isn't precise. It's close, but never dead-on.

Answer 61

yup

Answer 62

Why is it necessary to have so many beans in each container?

Answer 63

Oh man. I don't even know if I'm giving you the answers that your teacher's looking for. You sure you want my help, regardless?

Let me think.

Answer 64

Well, I think the answer to #10 is pretty simple.

Answer 65

It's because each parent has an equal chance of passing on each type of allele. That's the way that real life works.

Answer 66

This article should help you with the last question, about the law of segregation:
http://biology.about.com/od/geneticsglossary/g/law_of_segregation.htm

It's the one I've been reading, to figure out this lab.

Answer 67

ok, i number 8 is wrong

Answer 68

Why is it wrong?

Answer 69

i dont know..it just doesnt look right, i asked my friend and she said she got like 33. something

Answer 70

You had two boxes of beans.
Each box represents a parent. Two parents total. Right?

And each box has two types of alleles: Red, and White.

So, look at the punnet square here: