Question

d. base sequences in dna are not affected by this activity

1. hereditary information for most traits is generally located in

a. genes found on chromosomes c. the mitochondria of gametes
b. chromosomes found on genes d. the lysosomes in the cytoplasm

1. many years ago, a scientist grew pea plants that produced wrinkled peas. the peas from these plants produced new plants that also produced wrinkled peas. the scientist concluded that something in the parent plants was being transmitted to the next generation. this discovery is now known as

a. genetic engineering c. biological evolution
b. heredity d. natural selection

1. which statement best describes a human chromosome?

a. it is made of amino acid subunits that form genes
b. it contains genes that may code for the production of proteins such as enzymes
c. it is normally passed to the next generation through a placenta
d. it varies in function from one generation to the next

1. the transfer of genes from parents to their offspring is known as 1

a. differentiation b. immunity c. heredity d. evolution

1. which sequence correctly represents the arrangement of structures containing genetic material, from the largest to the smallest size? 1

a. chromosome → gene → nucleus c. gene → chromosome → nucleus
b. nucleus → chromosome → gene d. gene → nucleus → chromosome

Explanation:

• Question 5: Genes are segments of DNA on chromosomes that carry hereditary information. Chromosomes are not on genes (b is wrong). Mitochondria (c) and lysosomes (d) do not carry most hereditary information for traits.
• Question 6: Heredity is the passing of traits from parents to offspring. Genetic engineering (a) is a modern technique. Biological evolution (c) is about species - level changes over time. Natural selection (d) is a mechanism of evolution.
• Question 7: Chromosomes contain genes. Genes code for proteins (like enzymes). Chromosomes are made of DNA and proteins (not amino - acid subunits forming genes, a is wrong). They are passed through gametes (not placenta, c is wrong) and their basic function (carrying genetic info) is conserved (d is wrong).
• Question 8: Heredity is the transfer of genes from parents to offspring. Differentiation (a) is cell - specialization. Immunity (b) is about the body's defense. Evolution (d) is about species change.
• Question 9: The nucleus contains chromosomes. Chromosomes contain genes. So the order from largest to smallest is nucleus → chromosome → gene.

Answer:

1. a. Genes found on chromosomes
2. b. Heredity
3. b. It contains genes that may code for the production of proteins such as enzymes
4. c. Heredity
5. b. Nucleus → chromosome → gene