1. Consider the following statements regarding Mendel’s laws of inheritance:
1. The Law of Segregation states that allele pairs separate during gamete formation.
2. The Law of Independent Assortment states that genes for different traits segregate together.
3. The Law of Dominance states that recessive alleles are always expressed when dominant alleles are present.
How many statements are true?
a) Only 1
b) Only 2
c) All 3
d) None
2. Consider the following statements about mutations:
1. Mutations are always harmful.
2. Point mutations involve the substitution of a single nucleotide.
3. Mutations in somatic cells can be passed to the offspring.
How many statements are true?
a) Only 1
b) Only 2
c) All 3
d) None
3. Consider the following statements about genetic disorders:
1. Down syndrome is caused by the presence of an extra copy of chromosome 21.
2. Cystic fibrosis is an autosomal recessive disorder.
3. Hemophilia is an X-linked recessive disorder.
How many statements are true?
a) Only 1
b) Only 2
c) All 3
d) None
4. Consider the following statements regarding DNA:
1. RNA is a double-helix structure.
2. Adenine pairs with Guanine.
3. The sugar in RNA is deoxyribose.
How many statements are true?
a) Only 1
b) Only 2
c) All 3
d) None
5. Consider the following statements about genetic engineering:
1. CRISPR is the only technology used for gene editing.
2. Recombinant DNA technology involves inserting foreign DNA into host organisms.
3. Genetic engineering can never be used in agriculture.
How many statements are true?
a) Only 1
b) Only 2
c) All 3
d) None
6. Consider the following statements regarding gene expression:
1. Transcription is the process of converting DNA into mRNA.
2. Translation is the process of synthesizing proteins from mRNA.
3. Gene expression is regulated only at the transcriptional level.
How many statements are true?
a) Only 1
b) Only 2
c) All 3
d) None
7. Consider the following statements about genetic variation:
1. Crossing over occurs during mitosis, leading to genetic variation.
2. Genetic variation will not result from mutations.
3. Genetic variation is always beneficial for a species.
How many statements are true?
a) Only 1
b) Only 2
c) All 3
d) None
8. Consider the following statements about mitochondrial DNA:
1. Mitochondrial DNA is inherited from both parents.
2. Mitochondrial DNA mutations can lead to disorders.
3. Mitochondrial DNA is involved in energy production.
How many statements are true?
a) Only 1
b) Only 2
c) All 3
d) None
9. Consider the following statements about epigenetics:
1. Epigenetic changes do not alter the DNA sequence.
2. Epigenetic modifications can be influenced by environmental factors.
3. Epigenetic changes can be reversible.
How many statements are true?
a) Only 1
b) Only 2
c) All 3
d) None
10. Consider the following statements about human genome:
1. Humans have 46 chromosomes in total.
2. The Human Genome Project sequenced all human genes.
3. Most of the human genome consists of protein-coding genes.
How many statements are true?
a) Only 1
b) Only 2
c) All 3
d) None
