Question:
Match List-I with List-II
{|p{7cm}|p{7cm}|}
List-I (Flower Crop) & List-II (Basic chromosome number)
(A) Rose & (I) X = 9
(B) Gladiolus & (II) X = 12
(C) Marigold & (III) X = 15
(D) Chrysanthemum & (IV) X = 7
Match List-I with List-II
{|p{7cm}|p{7cm}|} List-I (Flower Crop) & List-II (Basic chromosome number)
(A) Rose & (I) X = 9
(B) Gladiolus & (II) X = 12
(C) Marigold & (III) X = 15
(D) Chrysanthemum & (IV) X = 7
{|p{7cm}|p{7cm}|} List-I (Flower Crop) & List-II (Basic chromosome number)
(A) Rose & (I) X = 9
(B) Gladiolus & (II) X = 12
(C) Marigold & (III) X = 15
(D) Chrysanthemum & (IV) X = 7
Show Hint
Remembering that the Rose family (Rosaceae) has a basic chromosome number of \( x = 7 \) is an easy way to match (A) with (IV) and verify the correct option.
Updated On: Jul 23, 2026
- (A) - (I), (B) - (II), (C) - (IV), (D) - (III)
- (A) - (III), (B) - (IV), (C) - (II), (D) - (I)
- (A) - (II), (B) - (III), (C) - (IV), (D) - (I)
- (A) - (IV), (B) - (III), (C) - (II), (D) - (I)
Show Solution
Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept:
This matching task focuses on the basic chromosome numbers (\( x \)) of key commercial flower crops.
Understanding basic ploidy levels is essential for cytology, cytogenetics, and hybridization programs in floriculture.
Step 2: Detailed Explanation:
Let us match each flower crop with its basic chromosome number:
(A) Rose (*Rosa* species):
The basic chromosome number for the genus *Rosa* is \( x = 7 \).
Cultivated roses can be diploids (\( 2n = 14 \)), triploids (\( 2n = 21 \)), tetraploids (\( 2n = 28 \)), or higher ploidy levels based on this basic number.
Hence, (A) matches with (IV).
(B) Gladiolus (*Gladiolus* species):
The basic chromosome number for *Gladiolus* is \( x = 15 \).
Commercial cultivars are often tetraploids (\( 2n = 4x = 60 \)).
Hence, (B) matches with (III).
(C) Marigold (*Tagetes* species):
The basic chromosome number for the genus *Tagetes* is \( x = 12 \).
French marigold (*Tagetes patula*) is an allotetraploid (\( 2n = 48 \)), and African marigold (*Tagetes erecta*) is a diploid (\( 2n = 24 \)), both based on \( x = 12 \).
Hence, (C) matches with (II).
(D) Chrysanthemum (*Chrysanthemum* species):
The basic chromosome number for *Chrysanthemum* is \( x = 9 \).
Many commercial large-flowered cultivars are complex hexaploids (\( 2n = 6x = 54 \)).
Hence, (D) matches with (I).
Step 3: Final Answer:
The correct matching sequence is:
(A) - (IV), (B) - (III), (C) - (II), (D) - (I).
This matches Option (D).
This matching task focuses on the basic chromosome numbers (\( x \)) of key commercial flower crops.
Understanding basic ploidy levels is essential for cytology, cytogenetics, and hybridization programs in floriculture.
Step 2: Detailed Explanation:
Let us match each flower crop with its basic chromosome number:
(A) Rose (*Rosa* species):
The basic chromosome number for the genus *Rosa* is \( x = 7 \).
Cultivated roses can be diploids (\( 2n = 14 \)), triploids (\( 2n = 21 \)), tetraploids (\( 2n = 28 \)), or higher ploidy levels based on this basic number.
Hence, (A) matches with (IV).
(B) Gladiolus (*Gladiolus* species):
The basic chromosome number for *Gladiolus* is \( x = 15 \).
Commercial cultivars are often tetraploids (\( 2n = 4x = 60 \)).
Hence, (B) matches with (III).
(C) Marigold (*Tagetes* species):
The basic chromosome number for the genus *Tagetes* is \( x = 12 \).
French marigold (*Tagetes patula*) is an allotetraploid (\( 2n = 48 \)), and African marigold (*Tagetes erecta*) is a diploid (\( 2n = 24 \)), both based on \( x = 12 \).
Hence, (C) matches with (II).
(D) Chrysanthemum (*Chrysanthemum* species):
The basic chromosome number for *Chrysanthemum* is \( x = 9 \).
Many commercial large-flowered cultivars are complex hexaploids (\( 2n = 6x = 54 \)).
Hence, (D) matches with (I).
Step 3: Final Answer:
The correct matching sequence is:
(A) - (IV), (B) - (III), (C) - (II), (D) - (I).
This matches Option (D).
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