Question

part 1: embryological development and infancy
every human being starts as a single fertilized cell that develops into a full grown human being over the course of roughly 18 years.

1. in the development of identical twins, one fertilized egg splits into two identical cells. these cells contain the same genetic material. eventually each of the cells forms multicellular twin children. model how these two cells produce multiple cells with the same genetic material, which then produces twins with the same genetic material. label key terms to include: parent cell, daughter cells, genes and/or chromosomes.

fertilized egg
fertilized egg producing multiple cells with the same genetic material.\tfertilized egg producing multiple cells with the same genetic material.
multiple cells producing a twin baby.\tmultiple cells producing a twin baby.

Explanation:

1. First, identify the initial fertilized egg as the parent cell, which holds full sets of chromosomes (and the genes they carry).
2. When this parent cell splits, label the two resulting cells as daughter cells; note they inherit identical chromosomes/genes from the parent.
3. For each daughter cell, label the next generation of dividing cells as daughter cells of the first split cell, all carrying matching chromosomes/genes.
4. Finally, connect the multicellular clusters to the twin babies, maintaining the link to the shared genetic material.

Answer:

Labeled Model Breakdown:

1. Top (Fertilized Egg): Label the single fertilized egg as Parent Cell; add a note inside/near it: Contains full set of chromosomes with identical genes
2. First Split (Two Cells): Label each of the two cells derived from the fertilized egg as Daughter Cells; add a note: Identical chromosomes/genes to parent cell
3. Cell Multiplication Boxes (Left/Right):

• Label the cells that split from each daughter cell as Daughter Cells
• Add a note to these cells: Carry identical chromosomes/genes from the original parent cell

1. Bottom Boxes (Twin Babies): Add a note below each baby: Developed from cells with identical genetic material (chromosomes/genes), creating genetically identical twins