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Standard XII
Biology
Significance of Crossing Over
If a mother i...
Question
If a mother is a carrier of colour blindness and the father is normal, show the possible genotype and phenotype of the offspring of the next generation, with the help of a punnett square
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Q.
A colour blind man
(
X
C
Y
)
has a colour blind sister
(
X
C
X
C
)
and a normal brother (XY). What is genotype of father and mother.
Q.
If father shows normal genotype and mother shows a carrier trait for haemophilia
Q.
Short / Long answer type questions.
Explain the inheritance of hemophilia in the first generation with normal father and carrier mother. Indicate the genotypes and phenotypes of the progeny.
Q.
A true-breeding tall, purple-flowered pea plant (TTPP) is crossed with a true-breeding dwarf, white-flowered plant (ttpp).
(a) What is the phenotype of the
F
1
generation?
(b) What is the genotype of the
F
I
1
generation?
(c) What four type of gametes are formed by
F
1
plants?
(d) Fill in the given Punnett square to show the offspring of the
F
2
generation.
(e) List the phenotype and ratios found in the
F
2
generation.
Q.
What is the phenotype of the offspring born to a woman with normal vision (homozygous) and a colour blind man?
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