Question

question 21
how did feeding pregnant mice a methyl - rich diet affect their offspring?

a. more offspring were brown and thin because methyl tags shut off agcouti genes

b. the offspring produced different dna sequences

c. the offspring lost chromosomes that contained the agcouti gene

d. all offspring were yellow and obese, destined to grow sick

question 22
google search: which foods are high in methyl groups? these are the foods that can lead to future generations being healthier by “shutting off” harmful genes.

a. bread, cheese, crackers, and potatoes

b. potatoes, carrots, beets, and celery

c. liver, eggs, legumes (beans), and leafy greens

d. beef, chicken, fish, and dairy

question 23
the foods that are high in methyl groups - when would be the best time to eat them for the betterment of future generations?

a. after someone is finished having children

b. in old age

c. only during times of illness

d. during pregnancy and early in childhood

Explanation:

Question 21

• Option a: Methyl tags (epigenetic modifications) can turn off genes like Agouti, leading to brown, thin offspring (matches epigenetic effects of methyl - rich diet).
• Option b: A methyl - rich diet doesn't change DNA sequences (only epigenetic marks), so this is wrong.
• Option c: Offspring still have the Agouti gene (methylation modifies expression, not presence), so this is wrong.
• Option d: A methyl - rich diet leads to healthier (brown, thin) offspring, not yellow, obese, sick ones, so this is wrong.

Foods high in methyl groups include liver, eggs, legumes, and leafy greens (these are nutrient - dense, methyl - donor - rich foods). The other options (a: processed carbs; b: mainly veggies with less methyl - donor content; d: mainly protein/fat sources without high methyl groups) don't match.

Methyl - rich foods affect future generations via epigenetic changes during pregnancy (when fetal development and epigenetic programming occur) and in childhood (early development). After having children (a) is too late, old age (b) doesn't target future generations, and only during illness (c) is not the main time.

Answer:

a. More offspring were brown and thin because methyl tags shut off Agouti genes

Question 22