All Grade 12 Student text books

Multiple-choice questions on cell division for Grade 11 biology:

1. Which phase of the cell cycle is characterized by the actual division of the cell into two daughter cells?
A) G1 phase
B) S phase
C) G2 phase
D) M phase

2. During which stage of mitosis do the sister chromatids line up along the equator of the cell?
A) Prophase
B) Metaphase
C) Anaphase
D) Telophase

3. The division of the cytoplasm following mitosis is called:
A) Cytokinesis
B) Meiosis
C) Interphase
D) Prophase

4. How many daughter cells are produced at the end of mitosis?
A) 1
B) 2
C) 3
D) 4

5. Which of the following is NOT a phase of mitosis?
A) Interphase
B) Prophase
C) Anaphase
D) Telophase

6. The process of crossing over occurs during which stage of meiosis?
A) Prophase I
B) Metaphase I
C) Anaphase I
D) Telophase I

7. In which phase of the cell cycle does DNA replication occur?
A) G1 phase
B) S phase
C) G2 phase
D) M phase

8. Which of the following is a characteristic of anaphase in mitosis?
A) Chromosomes condense
B) Nuclear envelope disappears
C) Sister chromatids separate and move to opposite poles
D) Spindle fibers form

9. The process by which a diploid cell divides to produce four haploid cells is called:
A) Mitosis
B) Meiosis
C) Cytokinesis
D) Interphase

10. Which of the following is a result of mitosis?
A) Production of gametes
B) Growth and repair of tissues
C) Reduction in chromosome number
D) Crossing over

Answer for biology questions:

1. D
2. B
3. A
4. B
5. A
6. A
7. B
8. C
9. B
10. B

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Biology questions for grade 11 about Mendelian inheritance.

Choose the best answer.

1. In Mendel's experiments with pea plants, the original parental plants used were __.
   A. Homozygous dominant
   B. Homozygous recessive
   C. Heterozygous
   D. None of the above

2. Mendel's Law of Segregation states that __.
   A. Alleles of different genes segregate independently during gamete formation
   B. Alleles of the same gene segregate during gamete formation
   C. Alleles of different genes assort independently during gamete formation
   D. Alleles of different genes are always linked

3. The genetic makeup of an organism is known as its __.
   A. Phenotype
   B. Genotype
   C. Dominant traits
   D. Recessive traits

4. If an individual is homozygous for a particular gene, it means that __.
   A. They have two of the same alleles for that gene
   B. They have two different alleles for that gene
   C. They exhibit a dominant phenotype
   D. They exhibit a recessive phenotype

5. A Punnett square is a tool used to __.
   A. Determine the phenotypic ratio of offspring
   B. Predict the genotype of offspring
   C. Determine the dominance of traits
   D. All of the above

6. Which of the following represents a heterozygous genotype?
   A. AA
   B. Aa
   C. aa
   D. BB

7. Mendel's Law of Independent Assortment applies to genes located on __.
   A. Homologous chromosomes
   B. Non-homologous chromosomes
   C. Sex chromosomes
   D. Autosomal chromosomes

8. In a monohybrid cross, the genotypic ratio of the F2 generation resulting from a heterozygous x heterozygous cross is expected to be __.
   A. 1:2:1
   B. 3:1
   C. 1:1
   D. 9:3:3:1

9. The physical expression of an organism's genes is called its __.
   A. Genotype
   B. Phenotype
   C. Allele
   D. Homologous trait

10. Mendel's Law of Dominance states that __.
    A. Dominant alleles always mask recessive alleles
    B. Recessive alleles always mask dominant alleles
    C. Homozygous alleles are always dominant
    D. Alleles assort independently during meiosis