Tag: biology

Questions Related to biology

Which one of the following statements regarding Pomato is correct?

biology ecology classification hierarchy hierarchy of classification different types of classifications

  1. It is a product of somatic hybridization

  2. It is obtained by gene manipulation

  3. It is a natural hybrid product of sexual reproduction

  4. It is the fusion product of archegonia and antheridia

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Correct Option: A

Which one of the following is the correct statement about the respective animal(s)? 

biology ecology classification hierarchy hierarchy of classification different types of classifications

  1. Donkey and horse should be considered one single species because they can successfully mate and produce an offspring.

  2. Donkey and horse are two different genuses.

  3. Mule is a separate species.

  4. Mule is neither a donkey nor a horse.

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Correct Option: D

Who of the following is associated with the description of life-forms in plants communities?

biology diversity in living things and their classification introduction to plant organs and germination seed to plants germination of seeds

  1. Tansley

  2. Shelford

  3. Slobodkin

  4. Raunkiaer

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Correct Option: A

Consider the following plants.
a. Curcuma longa
b. Ferula asafoetida
c. Myristica fragrans
d. Smilax aristolochiaefolia
From which of the plants are underground parts used for obtaining spices or products of commercial value?

biology diversity in living things and their classification introduction to plant organs and germination seed to plants germination of seeds

  1. $1$ and $2$

  2. $3$ and $4$

  3. $1, 2$ and $4$

  4. $1, 2, 3$ and $4$

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Correct Option: A

How many different types of phenotypes would be produced in $F _{1}$ progeny in the following cross that obeys Mendel's law of independent assortment $AABBCC\times aabbcc$.

biology mendel's law of inheritance mendel's laws laws of inheritance mendel's laws of inheritance

  1. $1$

  2. $8$

  3. $27$

  4. $64$

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Correct Option: A

Discovery Of Mendels law of segregation required the use of:

biology mendel's law of inheritance mendel's laws laws of inheritance mendel's laws of inheritance

  1. dihybrid parental and F1 crosses

  2. plants showing incomplete dominance

  3. test crosses

  4. parental crosses with true-breeding plants followed by crosses with F1 heterozygous plants

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Correct Option: D
Explanation:

Discovery of mendels law of segregation required the use of parental crosses with true breeding plants followed by crosses with f1 heterozygous plants.

So, the correct option is 'parental crosses with true-breeding plants followed by crosses with F1 heterozygous plants'

Mendel proposed his 'laws' on the basis of his researches on seven contrasting characters in garden pea which has $14$ chromosomes per somatic cell. If, instead of garden pea, Mendel had chosen to work on seven characters in a plant species having only four chromosomes per somatic cell, then the most likely outcome would have been that.

biology mendel's law of inheritance mendel's laws laws of inheritance mendel's laws of inheritance

  1. He would have discovered blending inheritance

  2. He could not have proposed that genes are located on the chromosomes

  3. He might not have discovered the law of independent assortment

  4. He might not have discovered the law of segregation

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Correct Option: A

If individuals of genotype Aa Bb Cc are intercrossed, how many different phenotypes can appear in their offspring?

biology mendel's law of inheritance mendel's laws laws of inheritance mendel's laws of inheritance

  1. 3

  2. 6

  3. 8

  4. 16

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Correct Option: B
Explanation:

In the given question the number of the heterozygous gene pair is 3 so the number of phenotypes will also be 3.

So, the correct option is '6'.

Which of the following explains how progeny can possess combinations of traits that neither parent possessed?

biology mendel's law of inheritance mendel's laws laws of inheritance mendel's laws of inheritance

  1. Polygenic inheritance

  2. Law of independent assortment

  3. Law of independent segregation

  4. Chromosome theory

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Correct Option: B
Explanation:

Mendel's law of independent assortment states that allele pairs separate and segregate independently of one another during the formation of gametes. So, traits are transmitted to offspring independently of one another and recombinants are seen along with the parental types in the genotype of the next generation. So, progeny can have a new combination of traits that are not seen in either parent. So, the correct option is 'Law of independent assortment'.

Which of the following is not considered as a law?

biology mendel's law of inheritance mendel's laws laws of inheritance mendel's laws of inheritance

  1. Law of dominance

  2. Law of independent assortment

  3. Law of segregation

  4. None of the above

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Correct Option: A
Explanation:

The law of dominance is significant and true but is not universally applicable. Only Law of independent assortment and Law of segregation are considered to be laws. The third one is considered as a basic principle but not a genetic law of Mendel. Therefore, (a) is the correct answer.