3. In humans, brown eyes (B) are dominant over blue (b). A brown eyed man marries a blue-eyed woman and they have three children, two of whom are brown-eyes and one of whom is blue-eyed.
whats the mans genotype?Heterozygous
whats the woman genotype?Homozygous
what are the genotypes and phenotypes of the offspring?The genotypes are Bb and bb the phenotypes are _____

Question

3.    In humans, brown eyes (B) are dominant over blue (b).  A brown eyed man marries a        blue-eyed woman and they have three children, two of whom are brown-eyes and one of        whom is blue-eyed. 
whats the mans genotype?Heterozygous
whats the woman genotype?Homozygous
what are the genotypes and phenotypes of the offspring?The genotypes are Bb and bb the phenotypes are _____

shrutipande9 · Answer

hello...lets start shall we?

shrutipande9 · Answer

u there?

anonymous · Answer

hey sorry about that my computer was actin dead slow so i had to start over

anonymous · Answer

@shrutipande9

shrutipande9 · Answer

ok lets start now...tell me wat all do u know about monohybrid cross and the pre requisites for it? or should we start from the beginning?

anonymous · Answer

we can begin

anonymous · Answer

and yes i know about it

anonymous · Answer

like i know about heterozygous and homozygous  but sometimes unsure what the question is asking me

shrutipande9 · Answer

okay..so now where r u stuck?

shrutipande9 · Answer

u know the basic terminologies? B for dominant b for recessive and how to draw a punnet square?

anonymous · Answer

like i want to ant you to check if my answer is on the right track i put the answer in. im unsure for phen of offspring .should i say 66% have brown eyes and 34 % have blue there?

shrutipande9 · Answer

actually see..in humans every birth is an independent event....

anonymous · Answer

aw ok

shrutipande9 · Answer

so like if u have Bb and bb parents then overall for the population the ratio is 1:1 for the children....but in humans out of 4 u cannot say that 2 will have blue and 2 brown..u getting me?

anonymous · Answer

but since they said we r only dealing with th 3 children i have 2 Bb and 1 bb i didnt put 4 because they have 3 children

shrutipande9 · Answer

ok lets put it this way...u know the parents have genotype Bb and bb right? and the possible genotypes of children can be Bb bb right? now they are having their first child...so now as the ratio is 1:1 he has a 505 chance of having blue eyes and 50% of brown..right?

shrutipande9 · Answer

now lets say the first child has brown eyes...now the parents are going to have the 2nd child...the birth of 2nd child has no link to the 1st child havingg brown eyes...the second child now also has 50% chaance of getting either blue or brown

shrutipande9 · Answer

u getting me?

anonymous · Answer

yes

anonymous · Answer

so i should say 50 has brown and 50 has blue?

shrutipande9 · Answer

50% $\color{red}c\color{red}h\color{red}a\color{red}n\color{red}c\color{red}e$ of getting brown or blue

anonymous · Answer

ohhh ok so even if they talk about 3 ppl still use the 4 boxes for the punnt square right?

shrutipande9 · Answer

yep...like this u mean right?|dw:1385050486805:dw|

anonymous · Answer

yea i got the same answer

shrutipande9 · Answer

cool:D

anonymous · Answer

:) so since they said what is the phenotype of the children we know that is physical characteristics so say 50% chance there would be brown eyes and 50% chance blue eyes right?

shrutipande9 · Answer

yes....correct

shrutipande9 · Answer

do u have a problem similar to this? so that i can be sure u have got it

anonymous · Answer

wow ook seems like i am on the right tract with this question thanks!!!!!!!!greatly appreciated .can u help me with another.this one i am clueless about it? can i post a different question ?

shrutipande9 · Answer

yep sure:)

anonymous · Answer

kkk