Question

1. human influence on inheritance

(s7l3c)

• selective breeding: humans choose parents with desirable traits (plants/animals).
• genetic engineering: direct modification of dna to add/remove traits.
• ethical & ecological questions: biodiversity loss, unintended consequences.

short response prompt (2–3 sentences): describe one positive and one negative effect of humans selecting for traits in organisms.
(leave lines for student response.)

Explanation:

For positive, selective breeding in agriculture (e.g., wheat) can develop crops with higher yield, ensuring food security. For negative, it may reduce genetic diversity (e.g., purebred dogs), making populations more vulnerable to diseases.

Answer:

One positive effect of humans selecting for traits in organisms is that selective breeding can produce crops with higher yields (like disease - resistant wheat) to enhance food production and security. One negative effect is that it often reduces genetic diversity within a population, for example, pure - bred dog breeds have a higher risk of inheriting genetic disorders due to the limited gene pool from selective breeding.