Question

1. which term refers to the occurrence of two different alleles for a specific gene in an individual’s genotype (aa)?

a. heterozygous dominant.

b. homozygous

c. heterozygous recessive

d. heterozygous

1. what aspect of scientific laws allows them to generate a body of observations?

a. they are only applicable to specific conditions.

b. they are based solely on personal beliefs.

c. they can change without evidence.

d. they demonstrate predictable patterns in nature.

1. which technique is used to combine dna from different sources?

a. cloning

b. recombinant dna technology

c. gene therapy

d. gene editing

1. which of the following best describes the process of translation?

a. the replication of dna in preparation for cell division

b. the folding of proteins into their functional shapes

c. the assembly of amino acids into a polypeptide chain by ribosomes

d. the synthesis of mrna from a dna template

1. what occurs during protein folding?

a. a polypeptide chain is synthesized

b. rna is transcribed from dna

c. a ribosome assembles amino acids

d. a protein adopts a specific 3d structure

1. what aspect of molecular biology aids in determining the divergence times between species?

a. genetic mutations

b. protein synthesis mechanisms

c. dna replication rates

d. changes in cytochrome c sequence

1. in the scientific method, what is a hypothesis?

a. an educated guess or testable prediction

b. a random idea

c. a proven fact

d. a stable hypothesis

Explanation:

Question 22

The question is about genetics, specifically the term for having two different alleles (Aa) for a gene. Heterozygous means having two different alleles (Aa), homozygous is same alleles (AA or aa), and other options are incorrect. So the correct term is heterozygous.

Scientific laws generate observations because they show predictable patterns in nature. Option a is wrong (laws are general, not specific), b (not based on beliefs), c (change with evidence, not without). So d is correct.

Recombinant DNA technology is used to combine DNA from different sources. Cloning is copying, gene therapy treats with genes, gene editing modifies genes. So b is correct.

Answer:

d. Heterozygous

Question 23