a tall pea plant bearing violet flowers is crossed with short pea plant bearing white flowers workout the F1 and F2 generation and give the phenotypic ratio.
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Answered by
45
it's a Mendel's dihybrid experiment where two characters are considering at one time.
here we have tall plant with violet flowers and short plant with white flowers.
TALL character denoted by T
short character as t
PURPLE character as P
white character as p
1) TTPP. cross ttpp
Result TtPp. (F1 generation)
then self pollination of F1 generation
phenotypic ratio will be 9:3:3:1.
the 9 represents the proportion of individuals displaying both dominant traits
the first 3 represents the individuals displaying the first dominant trait and the second recessive trait
the second 3 represents those displaying the first recessive trait and second dominant trait
the 1 represents the homozygous, displaying both recessive traits.
hope you understand
here we have tall plant with violet flowers and short plant with white flowers.
TALL character denoted by T
short character as t
PURPLE character as P
white character as p
1) TTPP. cross ttpp
Result TtPp. (F1 generation)
then self pollination of F1 generation
phenotypic ratio will be 9:3:3:1.
the 9 represents the proportion of individuals displaying both dominant traits
the first 3 represents the individuals displaying the first dominant trait and the second recessive trait
the second 3 represents those displaying the first recessive trait and second dominant trait
the 1 represents the homozygous, displaying both recessive traits.
hope you understand
GautamPrabhu:
is there a destined variable for every trait like u said its P and p for violet and white respectively
we are considering colour character.
purple as a dominant and white as a recessive.
thats why denoted P capital for purple and small p is for white
so can we use any alphabet or does it have to be P and p only
no...its better to use dominant character's first alphabet is best.. otherwise u will be confused
hope u got it
thanks a lot
Answered by
22
Tall plant, violet flowers: TTVV
Short plant, white flowers: ttvv
hence, by performing a cross between them, we get
TtVv (F1 generation)
By self crossing F1 generation,(TtVv X TtVv), we get
phenotypic ratio 9(tall violet) : 3(tall white) : 3(short violet) : 1(short white)
Short plant, white flowers: ttvv
hence, by performing a cross between them, we get
TtVv (F1 generation)
By self crossing F1 generation,(TtVv X TtVv), we get
phenotypic ratio 9(tall violet) : 3(tall white) : 3(short violet) : 1(short white)
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