Mendelian Principles Of Heridity

1.

Reasons for mendel's success
- A.
  
  Choice of study material. pea is a self pollinated crop with contrasting characters and is a short duration crop
- B.
  
  He studied the failure of earlier workers and kept accurate pedigree record
- C.
  
  He analysed his data mathematically and he studied one character at a time
- D.
  
  All of the above
Correct Answer
D. All of the above

Explanation
Mendel's success can be attributed to his choice of study material, which was the pea plant. Pea plants are self-pollinated and have easily distinguishable and contrasting characteristics, making them ideal for genetic studies. Additionally, pea plants have a short life cycle, allowing Mendel to conduct multiple experiments in a relatively short period of time. Furthermore, Mendel's success can be attributed to his meticulous record-keeping, as he kept accurate pedigree records of his experiments. Finally, Mendel's analytical approach, where he mathematically analyzed his data and studied one character at a time, also contributed to his success in understanding the principles of inheritance.

Rate this question:
2.

How many laws did Mendel gave
- A.
  
  1, law of dominance
- B.
  
  2, law of segregation and law of independent assortment
- C.
  
  3, law of segregation, law of independent assortment, law of dominance
- D.
  
  4, law of segregation, law of independent assortment, law of dominance, punnet square
Correct Answer
B. 2, law of segregation and law of independent assortment

Explanation
Mendel gave two laws: the law of segregation and the law of independent assortment. The law of segregation states that each individual has two alleles for each trait and these alleles separate during the formation of gametes. The law of independent assortment states that the inheritance of one trait does not affect the inheritance of another trait, as the alleles for different traits segregate independently of each other during gamete formation.

Rate this question:
3.

On which crop did Mendel worked
- A.
  
  Pea (Pisum sativum)
- B.
  
  Rajma (Phaseolus vulgaris)
- C.
  
  Hawkweed (Hieraceum)
- D.
  
  All
Correct Answer
D. All

Explanation
Mendel worked on all of the mentioned crops, including pea (Pisum sativum), rajma (Phaseolus vulgaris), and hawkweed (Hieraceum). Mendel's experiments with pea plants laid the foundation for the modern understanding of genetics and inheritance. He studied the patterns of inheritance in pea plants and formulated the laws of inheritance, which are still widely used today. While his work was primarily focused on pea plants, Mendel also conducted some experiments with other plants, including rajma and hawkweed.

Rate this question:
4.

Why did Mendel's work neglected
- A.
  
  He could not prove his work on Hieraceum and honey bees
- B.
  
  Mendel used mathematics to solve the problem which was not appreciated
- C.
  
  He could not give cytological evidence
- D.
  
  All
Correct Answer
D. All

Explanation
Mendel's work was neglected because he could not prove his work on Hieraceum and honey bees, he used mathematics to solve the problem which was not appreciated, and he could not provide cytological evidence.

Rate this question:
5.

Law of segrigation
- A.
  
  When two traits come together in one hybrid pair, the two characters do not mix with each other and are independent of each other. each gamete receives one of the two alleles during meiosis of the chromosomes.
- B.
  
  During a dihybrid cross, an assortment of each pair of traits is independent of the other. in other words, during gamete formation, one pair of trait segregates from another pair of trait independently
- C.
  
  Chromosomes occurred in pairs, and that different chromosomes of the haploid set were distinct from each other
- D.
  
  Tendency of gene to remain together in the same chromosome during hereditary transmission.
Correct Answer
A. When two traits come together in one hybrid pair, the two characters do not mix with each other and are independent of each other. each gamete receives one of the two alleles during meiosis of the chromosomes.

Explanation
The law of segregation states that when two traits come together in one hybrid pair, they do not mix with each other and remain independent. During meiosis, each gamete receives one of the two alleles for each trait. This means that the alleles for different traits segregate independently of each other during gamete formation. This is because chromosomes occur in pairs, and the different chromosomes of the haploid set are distinct from each other. This tendency of genes to remain together in the same chromosome during hereditary transmission is not related to the law of segregation.

Rate this question:
6.

Law of independent assortment
- A.
  
  When two traits come together in one hybrid pair, the two characters do not mix with each other and are independent of each other. each gamete receives one of the two alleles during meiosis of the chromosomes.
- B.
  
  During a dihybrid cross, an assortment of each pair of traits is independent of the other. in other words, during gamete formation, one pair of trait segregates from another pair of trait independently
- C.
  
  Chromosomes occurred in pairs, and that different chromosomes of the haploid set were distinct from each other
- D.
  
  Tendency of gene to remain together in the same chromosome during hereditary transmission.
Correct Answer
B. During a dihybrid cross, an assortment of each pair of traits is independent of the other. in other words, during gamete formation, one pair of trait segregates from another pair of trait independently

Explanation
The explanation provided is correct. The law of independent assortment states that during a dihybrid cross, the assortment of each pair of traits is independent of the other. This means that during gamete formation, one pair of traits segregates from another pair of traits independently. This is because each gamete receives one of the two alleles for each trait during meiosis, resulting in a random combination of traits in the offspring. This principle was discovered by Gregor Mendel through his experiments with pea plants and is one of the fundamental principles of genetics.

Rate this question:
7.

How many characters of pea did Mendel selected for his experiment
- A.
  
  5
- B.
  
  6
- C.
  
  7
- D.
  
  10
Correct Answer
C. 7

Explanation
Mendel selected 7 characters of pea for his experiment. This means that he chose 7 specific traits or characteristics of the pea plant to study and analyze. These traits could include things like flower color, seed shape, or plant height. By selecting these specific characters, Mendel was able to conduct his experiments and make observations on how these traits were inherited from one generation to the next.

Rate this question:
8.

In a monohybrid cross, what is the phenotypic ratio
- A.
  
  1:3:1
- B.
  
  3:1
- C.
  
  1:2:1
- D.
  
  2:1
Correct Answer
B. 3:1

Explanation
In a monohybrid cross, the phenotypic ratio of 3:1 suggests that for every three individuals with one phenotype, there is one individual with a different phenotype. This ratio indicates that the dominant phenotype is expressed in the majority of the offspring, while the recessive phenotype is expressed in a smaller proportion. This is a common outcome in monohybrid crosses where a single gene is being considered, and one allele is dominant over the other.

Rate this question:
9.

In a dihybrid cross, what is the ratio of test cross
- A.
  
  1:2:1
- B.
  
  1:1
- C.
  
  1:1:1:1
- D.
  
  2:1:2
Correct Answer
C. 1:1:1:1

Explanation
In a dihybrid cross, the ratio of the test cross is 1:1:1:1. This means that for every possible combination of alleles, there is an equal chance of them being passed on to the offspring. This ratio indicates that there is no dominance or recessiveness between the two traits being crossed, and each possible combination has an equal likelihood of occurring.

Rate this question:
10.

In a dihybrid cross, what is the phenotypic ratio
- A.
  
  1:2:1
- B.
  
  3:1
- C.
  
  1:1:1:1
- D.
  
  9:3:3:1
Correct Answer
D. 9:3:3:1

Explanation
A dihybrid cross involves the inheritance of two different traits. The phenotypic ratio of 9:3:3:1 suggests that there are four possible phenotypes in the offspring. It indicates that 9 individuals will have both dominant traits, 3 individuals will have one dominant and one recessive trait, 3 individuals will have the other dominant and recessive trait combination, and 1 individual will have both recessive traits. This ratio is commonly observed when two genes are independently assorting and segregating during gamete formation.

Rate this question:

Mendelian Principles Of Heridity

Reasons for mendel's success

How many laws did Mendel gave

On which crop did Mendel worked

Why did Mendel's work neglected

Law of segrigation

Law of independent assortment

How many characters of pea did Mendel selected for his experiment

In a monohybrid cross, what is the phenotypic ratio

In a dihybrid cross, what is the ratio of test cross

In a dihybrid cross, what is the phenotypic ratio