Class X

What does these symbols mean in pedgree analysis?
  1. Normal female, Mating
  2. Affected female, Mating
  3. Normal male, siblings
  4. Affected male, siblings
Homologous organ have
  1. Same structure, same function
  2. Different structure, different function
  3. Same structure, different function
  4. . different structure, same function
What is the probability that the male progeny will be a boy?`
  1. 50%
  2. 56%
  3. 47.43%
  4. it varies
Human baby will be a female its 23rd chromosome pair is
  1. XX
  2. XY
  3. YY
  4. XYY
On crossing Tall plant with Dwarf plant Mendel found the the ratio of dwarf plants in F2 generation was?
  1. 25 %
  2. 40 %
  3. 60 %
  4. 75 %
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