Question

Choose the correct statements among the following: A) Some genes are very tightly linked on the same chromosome, which shows higher recombination. B) Sutton proposed the chromosome theory of inheritance. C) Behaviour of the chromosome was parallel to the behaviour of genes. D) Mendel's selection of one of the contrasting traits is seed shape as inflated and wrinkled.

• A. A, B
• B. C, D
• C. A, C
• D. B, C

Hint:

Remember: Linked genes = "stay together" (low recombination); Chromosome behavior = Gene behavior.

Answer 1

The Correct Option is D

Step 1: Read the four statements.
The statements deal with linkage, who proposed the chromosomal theory, the parallel between chromosomes and genes, and a Mendel trait. We test each.

Step 2: Check statement A.
A says tightly linked genes show higher recombination. This is wrong. Genes that lie very close together separate less often, so they show lower recombination. A is false.

Step 3: Check statement B.
B says Sutton proposed the chromosomal theory of inheritance. This is true. Sutton, along with Boveri, gave this theory. B is correct.

Step 4: Check statement C.
C says the behaviour of chromosomes matched the behaviour of genes. This is true and is the heart of the chromosomal theory, since chromosomes move during meiosis just as Mendel's genes were predicted to. C is correct.

Step 5: Check statement D.
D says Mendel chose seed shape as inflated and wrinkled. This is wrong. Mendel's seed shape trait was round versus wrinkled; inflated and constricted belonged to the pod, not the seed. D is false.

Step 6: Pick the correct set.
The correct statements are B and C.
\[ \boxed{\text{B, C}} \]