Question

Please Please I need help. I am taking a genetics class and I have been working on this assignment for days with no relief: ) R codes for red flower color and r codes for white flower color.

a. What color would Rr be if R has complete dominance?


b. What color would Rr be if R and r are codominant?


c. What color would Rr be if R has incomplete dominance?

Answer 1

a : Red flower color
b : would have a mix of both colours, either as a striped or spotted pattern. Even though both colors show up separately, they're still recognizable as the colors of either homozygous genotype, but BOTH appear..
c : it show pink colour . @Missy1999

Answer 2

@Missy1999 r u there ??

Answer 3

Sarah786. I really appreciate your help and response. I am afraid because I am taking this class online and they may want to know where I gotten this information from. I am just so lost in this class.

Answer 4

Its easy .. If u know what is dominance and its types ...:)

Answer 5

Yes I am reviewing my notes and I do see some of that information but still would not have been able to get the answer. I really appreciate your help @ Sarah786

Answer 6

Np dear :) .. Do u need more help ??

Answer 7

I do need more help. I have at least 5 more questions. I would appreciate any help you can offer me.

Answer 8

Red-green colorblindness is an X-linked recessive mutation. A colorblind female is crossed with a normal male.

a. What are the parental genotypes? (Hint: the sex of the parent is important)


b. Diagram the F1 results from this cross. (Show your Punnett Square).


c. Diagram the F2 results. (Show your Punnett Square).

Any help you can offer is appreciated don't worry if you don't know I will keep trying to look it up in my chapter readings.

Answer 9

hi missy...can u tell me the genotype of parent or u are totally lost?

Answer 10

@shrutipande9 Sorry I am really that lost, that is the question presented and I just have not a clue how to answer it. Sorry

Answer 11

ok..no worries...no need to say sorry...
now when they say it is a sex linked recessive trait then the colour blind female should have x^nx^n genotype...

Answer 12

u know that the sex alleles aof female is XX and that of male is XY

Answer 13

With me so far?

Answer 14

Yes Sorry for the delay I was checking over my notes to make sure I was following you. I am following you

Answer 15

cool...now male is normal...so the genotype would be normal XY correct?
now can u make a cross of X^nX^n x XY?

Answer 16

Females possess two X chromosomes;
so there are three possible genotypes among females:
X1X1 and X1Xc, which produce normal vision, and XcXc,
which produces color blindness.

Answer 17

Males have only a single X
chromosome and two possible genotypes: X1Y, which produces
normal vision, and XcY

Answer 18

okay...u havewritten the possibilities absolutely correct...but every genotpe is not possible if we consider these 2 parents...for eg u cannot get X1X1 female with these parents....so lets draw a punnet..shall we? can u complete a punnet for me?

Answer 19

Ok I will try. one sec. Thanks again for your help

Answer 20

cool...i am always happy 2 help:D especially when it is genetics..:D

Answer 21

Gametes Mom (x+, Xc) Dad (Xc, Y)
X Normal female= X+Xc Color- blind female= XcXc
Y Normal male= X+Y Color-blin male= XcY

Answer 22

Sorry if it is hard to read. I tried to line it up correctly

Answer 23

ohh..ok wait...tell me what is the genotype of mother?

Answer 24

Would it be X+Xc?

Answer 25

My gametes should be Xc and Y, I think

Answer 26

X+ is normal vision and Xc is color blindness

Answer 27

no no..see they have given mother is colourblind...and also it is due to a recessive trait correct? so for a recessive trait to express mom should be homozygous recessive..ie XcXc..correct?

Answer 28

if mom becomes X+Xc then she would become normal not colourblind..getting me so far?

Answer 29

yes. Ok I have it all mixed up

Answer 30

So I need to switch it around?

Answer 31

yep...tell me d genotype of mother and father then u are all good to go ahead...

Answer 32

So mother is XcXc and father is X+Y+

Answer 33

absolutely correct..:D
now u can go ahead with the punnet..and draw it this way..it becomes easier

Answer 34

Wow thank you so very much for helping me understand this.

Answer 35

always happy 2 help:D

Answer 36

Genetics gets harder and harder. Any time to help with another question?

Answer 37

hey..srry i dozed off yest...yes sure i can help u with a few more questions...