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Mendels Laws Of Inheritance Free Doubts and Solutions

CBSE - XII Science - Biology - Principles of Inheritance and Variation

Mention all the Gamate produced from AaBbCcDe?And Name them

Asked by hemanttkumarr 14th July 2018, 7:42 PM
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CBSE - XII Science - Biology - Principles of Inheritance and Variation

Mention the gamates produced from genotype AaBbCcDd?

Asked by hemanttkumarr 2nd July 2018, 8:44 PM
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CBSE - XII Science - Biology - Principles of Inheritance and Variation

Why

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CBSE - XII Science - Biology - Principles of Inheritance and Variation

Why

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Asked by tandonyashika 25th June 2018, 10:02 PM
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CBSE - XII Science - Biology - Principles of Inheritance and Variation

If in a test cross, equal number of round yellow seeded plants and wrinkled yellow seeded plants are obtained, what is the genotype of the plant ? (1) RRYY (2) RrYY (3) RrYy (4) RRYy    

Asked by Atulcaald 19th May 2018, 1:37 AM
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CBSE - XII Science - Biology - Principles of Inheritance and Variation

  In a cross between a pure round yellow seeded plant with a pure wrinkled green seeded plant, how many plants are produced in F2 out of 16 which are homozygous for one pair and heterozygous for another ?

Asked by Atulcaald 19th May 2018, 1:36 AM
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CBSE - XII Science - Biology - Principles of Inheritance and Variation

27 genotypes in a hybrid selfing will produce how many phenotypes ?

Asked by Atulcaald 19th May 2018, 1:34 AM
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CBSE - XII Science - Biology - Principles of Inheritance and Variation

  Genes C and P are Complementary in Sweet pea plant and when present together produces coloured flowers. What will be the product of cross between CcPp × Ccpp? (1) 2 white and 6 coloured flowers (2) 3 white and 5 coloured flowers (3) 2 coloured and 6 white flowers (4) 3 coloured and 5 white flowers

Asked by Atulcaald 15th May 2018, 2:37 PM
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CBSE - XII Science - Biology - Principles of Inheritance and Variation

  How many genotypes are produced in F2 generation in a dihybrid cross if both genes are pleiotrophi

Asked by Atulcaald 15th May 2018, 2:29 PM
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CBSE - XII Science - Biology - Principles of Inheritance and Variation

  Maximum height of a plant is 30 ft and minimum height is 10 ft. If plant height is controlled by 3 pairs of genes, then the height of plant with genotype AaBbCc will be :

Asked by Atulcaald 15th May 2018, 2:28 PM
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CBSE - XII Science - Biology - Principles of Inheritance and Variation

    When AABbCc is crossed with aaBbCc then the probality of genotype AaBbCc will be

Asked by Atulcaald 29th April 2018, 1:10 AM
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CBSE - XII Science - Biology - Principles of Inheritance and Variation

In independent assortment what actually assort independently :-  a) Characters   b) Contrasting traits  c) Allelic genes  d) Non homologous chromosomes  

Asked by dipanshusingla029 22nd April 2018, 4:48 PM
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CBSE - XII Science - Biology - Principles of Inheritance and Variation

Write the Mendel's dihybrid cross between YyRr and YYrr.

Asked by kpbhake 16th April 2018, 7:01 PM
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CBSE - XII Science - Biology - Principles of Inheritance and Variation

difference between genes and alleles  

Asked by Atul Singh 7th April 2018, 2:59 PM
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CBSE - XII Science - Biology - Principles of Inheritance and Variation

define and design a test cross?

Asked by gargimoitreyee 1st April 2018, 12:46 AM
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CBSE - XII Science - Biology - Principles of Inheritance and Variation

Inheritance is the basis of heredity and gene is the unit of heredity. What does these lines mean

Asked by ashutosh25807 22nd February 2018, 7:23 PM
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CBSE - XII Science - Biology - Principles of Inheritance and Variation

what is the difference between gene and allele

Asked by DR JOYANTA KUMAR CHOUDHURY 11th February 2017, 6:31 PM
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CBSE - XII Science - Biology - Principles of Inheritance and Variation

what basically alleles are ?are they genes controlling same trait from diffrent parents or something else?

Asked by upmaniousagarika 8th June 2016, 11:12 PM
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CBSE - XII Science - Biology - Principles of Inheritance and Variation

please tell definations of  Gene, Alleles, Dominant, Recessive,Heterozygous, Homozygous, Genotype, phenotype,

Asked by rutujasarangmehta 11th April 2015, 7:13 PM
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CBSE - XII Science - Biology - Principles of Inheritance and Variation

What is the phenotypic ratio of F1 progeny in codominance?

Asked by Areeba Ahmad 15th March 2015, 11:54 PM
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CBSE - XII Science - Biology - Principles of Inheritance and Variation

Why only one trait is dominant and another recessive.Is there any there any reason behind this?

Asked by sagarmanisha97 16th July 2014, 8:41 PM
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CBSE - XII Science - Biology - Principles of Inheritance and Variation

(a) Explain a monohybrid cross taking seed coat colour as a trait in Pisum sativum. Work out the cross up to the F2 generation. (b) State the laws of inheritance which can be derived from such a cross. (c) How is the phenotypic ratio of the F2 generation different in a dihybrid cross?

Asked by Topperlearning User 16th June 2014, 2:47 PM
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CBSE - XII Science - Biology - Principles of Inheritance and Variation

In one family, each of the four children has a different blood group. The mother is group A and the father is group B. Explain this pattern of inheritance with the help of a cross along with their genotypes.

Asked by Topperlearning User 16th June 2014, 2:47 PM
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CBSE - XII Science - Biology - Principles of Inheritance and Variation

A non-haemophilic couple was informed by their doctor that there is a possibility of a haemophilic child to be born to them. Explain the basis on which the doctor conveyed this information. Give the genotypes and the phenotypes of all possible children who could be born to them?

Asked by Topperlearning User 16th June 2014, 2:47 PM
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CBSE - XII Science - Biology - Principles of Inheritance and Variation

In snapdragon (Antirrhinum majus), a plant with red flowers was crossed with a plant with white flowers. Work out all the possible genotypes and phenotypes of the F1 and F2 generations. Comment on the pattern of inheritance in this case.

Asked by Topperlearning User 16th June 2014, 2:47 PM
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CBSE - XII Science - Biology - Principles of Inheritance and Variation

In garden pea (Pisum sativum), a plant with red flowers was crossed with a plant with white flowers. Work out the possible genotypes and phenotypes of F1 and F2 generations. State any one of Mendel's law which could be derived from this cross.

Asked by Topperlearning User 16th June 2014, 2:47 PM
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CBSE - XII Science - Biology - Principles of Inheritance and Variation

How does a test cross help in identifying the genotype of the organism? Explain.

Asked by Topperlearning User 16th June 2014, 2:47 PM
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CBSE - XII Science - Biology - Principles of Inheritance and Variation

Inheritance pattern of ABO blood group in humans shows dominance, co-dominance and multiple allelism. Explain each concept with the help of blood group genotypes.

Asked by Topperlearning User 16th June 2014, 2:47 PM
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CBSE - XII Science - Biology - Principles of Inheritance and Variation

Why did Mendel choose garden pea for his experiment? How did he make sure that the plants were true breeding?

Asked by Topperlearning User 16th June 2014, 2:47 PM
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CBSE - XII Science - Biology - Principles of Inheritance and Variation

(i) State the principle of independent assortment. (ii) How would the following affect the phenomenon of independent assortment? (a) Crossing over (b) Linkage

Asked by Topperlearning User 16th June 2014, 2:47 PM
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CBSE - XII Science - Biology - Principles of Inheritance and Variation

Mendel crossed plants which bred true for yellow seeds with plants which bred true for green seeds. All seeds in the F1 generation were yellow. Work out the inheritance involved in this cross by using symbols for the trait. Which trait was dominant?

Asked by Topperlearning User 16th June 2014, 2:47 PM
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CBSE - XII Science - Biology - Principles of Inheritance and Variation

Work out F1 and F2 generation to explain the inheritance of flower colour in Pisum sativum. Give the phenotypic and genotypic ratios (start with pure breeding).

Asked by Topperlearning User 16th June 2014, 2:47 PM
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CBSE - XII Science - Biology - Principles of Inheritance and Variation

Write the genotype of (i) an individual who is a carrier of the sickle cell anaemia gene but apparently unaffected, and (ii) an individual affected with the disease.

Asked by Topperlearning User 16th June 2014, 2:47 PM
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CBSE - XII Science - Biology - Principles of Inheritance and Variation

Define heterozygous and homozygous.

Asked by Topperlearning User 16th June 2014, 2:47 PM
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CBSE - XII Science - Biology - Principles of Inheritance and Variation

Name the respective pattern of inheritance where F1 phenotype (a) Does not resemble either of the two parents and is in between the two. (b) Resembles only one of the two parents.

Asked by Topperlearning User 16th June 2014, 2:47 PM
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CBSE - XII Science - Biology - Principles of Inheritance and Variation

When a tall pea plant was self-pollinated, one-fourth of the progeny was dwarf. Give the genotype of the parent and dwarf progeny.

Asked by Topperlearning User 16th June 2014, 2:47 PM
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CBSE - XII Science - Biology - Principles of Inheritance and Variation

Name one autosomal dominant and one autosomal recessive Mendelian disorder in humans.

Asked by Topperlearning User 16th June 2014, 2:47 PM
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CBSE - XII Science - Biology - Principles of Inheritance and Variation

Name the event during cell division cycle which results in the gain or loss of chromosomes.

Asked by Topperlearning User 16th June 2014, 2:47 PM
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CBSE - XII Science - Biology - Principles of Inheritance and Variation

Why in a test cross did Mendel cross a tall pea pant with a dwarf pea plant only?

Asked by Topperlearning User 16th June 2014, 2:47 PM
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CBSE - XII Science - Biology - Principles of Inheritance and Variation

A garden pea plant (A) produced inflated yellow pod, and another plant (B) of the same species produced constricted green pods. Identify the dominant traits.

Asked by Topperlearning User 16th June 2014, 2:47 PM
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CBSE - XII Science - Biology - Principles of Inheritance and Variation

Mention the type of allele which expresses itself only in a homozygous state in an organism.

Asked by Topperlearning User 16th June 2014, 2:47 PM
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CBSE - XII Science - Biology - Principles of Inheritance and Variation

A diploid organism is heterozygous for 4 loci, how many types of gametes can be produced?
What is the meaning of loci and locus? please explain in detail.

Asked by 7th June 2014, 1:39 PM
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CBSE - XII Science - Biology - Principles of Inheritance and Variation

A diploid organism is heterozygous for 4 loci, how many types of gametes can be produced?
What is the meaning of loci and locus? please explain in detail.

Asked by 7th June 2014, 1:39 PM
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