Cell Structure and Function

What is a bivalent in the context of Meiosis I?

• A single chromosome with two chromatids
• A pair of sister chromatids
• A pair of homologous chromosomes
• A group of four centromeres

What is the term used for the pairing of homologous chromosomes during Zygotene stage of Prophase I?

• Chiasmata
• Crossing over
• Synapsis
• Terminalization

What is the correct sequence of sub-stages in Prophase I of Meiosis I?

• Leptotene, Zygotene, Pachytene, Diplotene, Diakinesis
• Leptotene, Pachytene, Zygotene, Diplotene, Diakinesis
• Zygotene, Leptotene, Diplotene, Pachytene, Diakinesis
• Diakinesis, Diplotene, Pachytene, Zygotene, Leptotene

Why is mitosis described as an equational division?

• The division occurs in equal phases
• It divides the cell into two equal parts only in plants
• It reduces the chromosome number by half
• Daughter cells receive the same number and kind of chromosomes as the parent cell

What is the role of mitosis in multicellular organisms regarding tissue repair?

• It reduces cell number
• It prevents cell growth
• It increases genetic variation
• It replaces damaged or lost cells