Question

question 3
which of the following is an example of why two organisms with the same gen
identical twins who were raised in the same house and exposed to the same things.
two worker bees who are exposed to the same food types
two twin mice who are both exposed to grooming and a low stress environment
identical twins who are separated at birth. one has limited access to food and one has
question 4
when is gene expression turned off?
when chromatids are closed
when dna is open

Explanation:

1. For Question 3: Organisms with identical genes can show differences due to environmental impacts. Separated identical twins share the same genotype but have different environmental conditions (food access), which demonstrates how environment can create phenotypic differences despite identical genes. The other options involve shared environments, so they would not show differences from genetic identity.
2. For Question 4: Gene expression requires DNA to be accessible (open) for transcription proteins to bind. When chromatids (packaged DNA) are tightly closed (condensed), the DNA is not accessible, so gene expression is turned off. Open DNA allows for gene expression to occur.

Answer:

1. Identical twins who are separated at birth. One has limited access to food and one has (full access to food, implied).
2. When chromatids are closed