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In Which Cross is 3:1 Ratio Obtained? - Biology

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प्रश्न

In which cross is 3:1 ratio obtained?
एका वाक्यात उत्तर
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उत्तर

Monohybrid cross.
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पाठ 3: Principles of Genetics - Exercise 1 [पृष्ठ २०]

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फ्रँक Biology II [English] Class 7 ICSE
पाठ 3 Principles of Genetics
Exercise 1 | Q 4 | पृष्ठ २०

संबंधित प्रश्‍न

Differentiate between the following:

Homozygous and Heterozygous


A child has blood group O. If the father has blood group A and the mother has blood group B, work out the genotypes of the parents and the possible genotypes of the other offspring.


Mention whether the cross is a monohybrid or dihybrid.


What is a monohybrid cross? How did Mendel perform this cross?


A garden pea plant produces axial white flowers. Another of the same species produced terminal violet flowers. Identify the dominant trait?


Pure-bred tall pea plants are first crossed with pure-bred dwarf pea plants. The pea plants obtained in the F1 generation are then selfed to produce F2 generation of pea plants.

What do the plants of the F1 generation look like?


Pure-bred tall pea plants are first crossed with pure-bred dwarf pea plants. The pea plants obtained in the F1 generation are then selfed to produce F2 generation of pea plants.

What is the ratio of tall plants to dwarf plants in the F2 generation?


A Monohybrid cross is ______


In a cross between red coloured and white coloured flowers, when plants with red coloured flowers of F1 generation were self pollinated, plants of F2 generation were obtained in which 75% of plants were with red flowers and 2.5% plants were with white flowers.

Explain the inheritance of traits in the above cross with the help of a flow chart only along with the ratio of plants obtained.


Given below is a schematic representation of the inheritance of the shape of the seeds of garden peas. Answer the questions that follow:

  1. Which is the dominant and recessive allele of the trait?
  2. What does the ratio 3 : 1 in the F2 generation represent?
  3. State Mendel's Law of Dominance.

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