What number and types of chromosomes are found in a human somatic cell?

• 45 autosomes and 1 sex chromosome
• 21 autosomes and 2 sex chromosomes
• 22 autosomes and 1 sex chromosome
• 44 autosomes and 2 sex chromosomes

44 autosomes and 2 sex chromosomes

In alternation of generations, the diploid stage of a plant that follows fertilization called the sporophyte.

• True
• False

True

How are sister chromatids and homologous chromosomes different from each other?

• Homologous chromosomes contain the same gene loci but may have different alleles of a particular gene. Sister chromatids are identical copies of each other produced during DNA replication.
• Homologous chromosomes are identical copies of each other. One sister chromatid comes from the father, and one comes from the mother.
• Sister chromatids are only formed during mitosis. Homologous chromosomes are formed during meiosis.
• Homologous chromosomes are closely associated with each other in both mitosis and meiosis. Sister chromatids are only associated with each other during mitosis.

Homologous chromosomes contain the same gene loci but may have different alleles of a particular gene. Sister chromatids are identical copies of each other produced during DNA replication.

In diploid cells: mitosis results in the formation of two diploid cells; meiosis results in the formation of 2 haploid cells.

• True
• False

False

Which of the following occurs during meiosis but not during mitosis?

• Chromosomes align at the metaphase plate.
• Synapsis occurs.
• Chromosomes migrate to opposite poles
• A spindle apparatus forms.

Synapsis occurs.