Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 12-science Answered

Why
question image
Asked by tandonyashika | 25 Jun, 2018, 10:02: PM
answered-by-expert Expert Answer
  • Incomplete dominance is the phenomenon where none of the two contrasting alleles or factors is dominant.
  • The expression of the character in a hybrid or F1 individual is intermediate or a fine mixture of the expression of the two factors.
  • Incomplete dominance is an example of quantitative inheritance where only a single gene pair is involved.
  • The phenotypic ratio of offspring in F2 generation is 1:2:1 which is similar to genotypic ratio.

Example of Incomplete Dominance

  • In Mirabilis jalapa (Four O’ Clock plant) and Antirrhinum majus (Snapdragon plant), there are two types of flowers, red and white.
  • When the two types of plants are crossed, the hybrids of F1 generation bear pink flowers.
  • When the F1 hybrids are selfed, we obtain three types of plants of F2 generation; one with red flowers, one with pink flowers and one with white flowers in the ratio of 1:2:1.
  • The appearance of pink colour is either due to mixing of red and white colours or the expression of a single gene for pigmented flower which produces only pink colour.
Answered by Sheetal Kolte | 28 Jun, 2018, 02:52: PM
CBSE 12-science - Biology
Asked by ishtiyaqishuuu | 27 Jan, 2023, 07:37: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Biology
Asked by rjha0188 | 25 Aug, 2021, 05:49: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Biology
Asked by goyalpavitarta | 19 Jul, 2021, 12:06: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Biology
Asked by vaishnavi tirunagari | 04 Jun, 2020, 08:10: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Biology
Asked by parmaraum8827.12sdatl | 18 Apr, 2020, 01:54: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Biology
Asked by sanchitdora5 | 17 Apr, 2020, 12:46: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Biology
Asked by sanchitdora5 | 30 Mar, 2020, 10:10: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Biology
Asked by mesweetayushigupta | 13 Oct, 2019, 01:01: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
Get Latest Study Material for Academic year 24-25 Click here
×