English
Karnataka Board PUCPUC Science 2nd PUC Class 12

Differentiate between the following: Dominance and Recessive

Advertisements
Advertisements

Question

Differentiate between the following:

Dominance and Recessive

Distinguish Between
Advertisements

Solution

Sr. No. Dominance Recessive
1. The dominant allele may reveal itself even in the presence of the recessive gene. A recessive allele or factor cannot express its effect in the presence of a dominant allele.
2. It does not require another similar allele to influence the phenotype; for example, Tt is tall. It has a phenotypic effect solely in the presence of an equivalent allele, such as tt, which is dwarf.
3. Dominant alleles or factors can create full polypeptides or enzymes that express their effects, such as the red colour of pea flowers. The recessive allele produces an incomplete or faulty polypeptide or enzyme, resulting in the absence of the effects of the dominant allele, such as a white flower colour in peas.
shaalaa.com
  Is there an error in this question or solution?
Chapter 4: Principles of Inheritance and Variation - EXERCISES [Page 78]

APPEARS IN

NCERT Biology [English] Class 12
Chapter 4 Principles of Inheritance and Variation
EXERCISES | Q 2. (a) | Page 78
Nootan Biology [English] Class 12 ISC
Chapter 4 Principles of Inheritance and Variation
NCERT EXERCISES WITH ANSWERS | Q 2. (a) | Page 211

RELATED QUESTIONS

Differentiate between the following:

Monohybrid and Dihybrid


How would you find out whether a given tall garden pea plant is homozygous or heterzygous? Substantiate your answer with the help fo Punnett squares.


Given below are the F2 – phenotypic ratios of two independently carried monohybrid crosses :
(i) 1 : 2 : 1
(ii) 3 : 1
Mention what does each ratio suggest.


Explain Mendel’s monohybrid progeny with the help of any one cross.


What do you understand by monohybrid cross?

Mention whether the cross is a monohybrid or dihybrid.


Answer the following question.
Write the basis on which Alfred Sturtevant explained gene mapping.


A certain couple got four daughters in a sequence and no son. Does it mean that the husband does not produce Y-chromosome bearing sperms? Explain. What is the chance of this couple having a daughter?


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


What do you understand by the terms phenotype and genotype?


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?


Give reasons why acquired characters are not inherited.


Genotypic ratio of a monohybrid cross is ______.


A Monohybrid cross is ______


Punnett square is used to know


Cross between hybrid and recessive parent:


Assertion (A): In humans, if gene (B) is responsible for black eyes and gene (b) responsible for brown eyes, then the colour of eyes of the progeny having gene combination Bb, bb or BB will be black only.

Reason (R): The black colour of the eyes is a dominant trait.


Monohybrid crosses are useful in demonstrating which of the following laws of inheritance suggested by Mendel?


A monohybrid cross is a genetic cross in which how many pair(s) of contrasting characters is/are studied?


Which pair of contrasting characters is studied in the pea plant monohybrid cross?


What are the phenotype and genotype of all offspring produced by \[TT \times tt\]?


In the first filial generation, what is the observation for the cross \[TT \times tt\]?


What is the genotypic ratio in F2?


Which conclusion follows from the tall and dwarf pea plant monohybrid cross?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×