Question

A pea plant that produces round (R), green (Y) seeds is crossed with a pea plant that produces wrinkled (r), yellow (y) seeds. Find the phenotypic ratio of the F2 generation.

Help me please!

Answer 1

\(\begin{array}l \large \mathcal
{\color{red}{\text{W}}\color{orange}{\text{e}}\color{#e6e600}{\text{l}}\color{green}{\text{c}}\color{blue}{\text{o}}\color{purple}{\text{m}}\color{purple}{\text{e}}\color{red}{\text{
}}\color{orange}{\text{t}}\color{#e6e600}{\text{o}}\color{green}{\text{
}}\color{blue}{\text{O}}\color{purple}{\text{p}}\color{purple}{\text{e}}\color{red}{\text{n}}\color{orange}{\text{}}\color{#e6e600}{\text{S}}\color{green}{\text{t}}\color{blue}{\text{u}}\color{purple}{\text{d}}\color{purple}{\text{y!}}\color{red}{\text{}}\color{orange}{\text{!:}}\color{#e6e600}{\text{)}}\color{green}{\text{}}}\end{array}\)
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Happy studying:D

Answer 2

now moving to ur question...can u tell me d genotype of the parents?

Answer 3

it is not given in the question? is it possible?

Answer 4

no i was asking u...have solved such genetics ques earlier?
i just wanted to know how much u know so that i can explain from that point

Answer 5

actually its my sister's HW, i can get what will you explain to me :) but unfortunately, i can't answer it .

Answer 6

ahh i c....so lets start
see basically when u write a genotype one trait(ie a character for eg red colour) is defined by 2 letters. eg TT is homozygous dominant for tall plant.
capital letter shows dominant allele
small letter shows recessive
with me so far?

Answer 7

ok ok .. im with you ..

Answer 8

cool....now in ur problem the allele given with capital letters r dominant and small recessive..ok?
ill give u the genotype of 1 parent and from that u can tell me d genotype of other.
generally the 1st parents are considered homozygous if not mentioned particularly.
homozygous is same type of letter both capital or both small
now the parent having round and green seeds has genotype RRyy
now can u tell me d genotype of other parent?

Answer 9

rrYY ?

Answer 10

yes cool..:D
now we have to make gametes..its like making combinations. consider the 1st parent RRyy. u have to make a combination of 2 letters in which i have atleast 1 r and 1 y..
do here it would be Ry(because thats the only combination possible)
and for other parent rY correct?

Answer 11

yes yes , then ...

Answer 12

now u combine d gametes ie cross them
Ry x rY ------ RrYy.
this is f1
now take f1 as d parents. so u have parents RrYy and RrYy
now make gametes of each and den i will show u d punnet

Answer 13

Then what's next ..

Answer 14

another gametes? so
ry x RY ------------- rRyY ?

Answer 15

and Ry rY apart from the 2 u wrote....no we have to make a punnet square

Answer 16

now can u fill in rest of d boxes?

Answer 17

RRYY RRYy RrYY RrYy
RRyY RRyy RrYy Rryy
rRYY rRYy rrYY rrYy
rRyY rRyy rRyY rryy

is it ryt ?

Answer 18

just 3rd in d last is wrong rrYy..but i guess it was just a typo..
rest all r corect:D
now RR an Rr give round seeds
rr gives wrinkled
YY and Yy green seeds
yy yellow seeds.
so the phenotype of RRYY is round green seeds...now can u tell d phenotype of the rest? write it in d box

Answer 19

Use d pencil in d right corner