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WorksheetsGrowth and Development
Total questions: 20
Worksheet time: 10mins
What biological process produces haploid gametes?
Mitosis
Meiosis
Fertilisation
crossing over
What term is used to describe the 'half' set of chromosomes in sex cells?
Haploid
Diploid
Polyploid
Zygote
The fusion of egg and sperm to produce a diploid zygote is called:
Reproduction
Nuclear fusion
Sex
Fertilisation
Which of the following are examples of sexual reproduction?
Internal fertilisation
External fertilisation
Binary fission
Meiosis
What comes first?
Fetus
Morula
Blastocyst
Placenta
How long does antenatal development take in humans?
28 days
52 weeks
9 months
7 months
The blastocyst will develop into:
The baby and the placenta
The baby only
The placenta only
The endoderm, ectoderm and mesoderm
Which of the following tissues will develop from the ectoderm?
skin and nerves
blood vessels and bones
lungs, liver and pancreas
heart, eyes and teeth
Which of the following tissues will develop from the endoderm?
skin and nerves
blood vessels and bones
lungs, liver and pancreas
heart, eyes and teeth
Which of the following tissues will develop from the mesoderm?
skin and nerves
blood vessels and bones
lungs, liver and pancreas
heart, eyes and teeth
How long is the embryo after 9 weeks?
3 mm
3 cm
13 cm
30 cm
a. What is the approximate length of a baby at birth (40 weeks)?
30 cm
40 cm
50 cm
65 cm
1. When does the embryo contain totipotent stem cells?
Morula stage
Blastocyst stage
Pre-fertilisation stage
Fetal stage
1. When the blastocyst forms stem cells are no longer totipotent. What are they now called?
Pluripotent
Multipotent
Oligopotent
Unipotent
1. What is an example of a unipotent stem cell?
Any cell in the mesoderm, ectoderm or endoderm
Any cell in the morula
Any cell in the bone marrow
Muscle stem cells
What stem cells can scientists make by modifying adult skin cells?
Induced totipotent stem cells (iTSCs)
Multipotent stem cells (MSCs)
Induced pluripotent stem cells (iPSCs)
Oligopotent stem cells (OPSs)
Which is an example of a degenerative disease caused by the death of cells?
Cancer
AIDS/HIV
Cystic Fibrosis
Parkinson's Disease
Therapeutic cloning involves what process?
Creating embryo's by injecting patient nuclei into donor eggs
Cloning embryo's to create stem cells
Genetically modifying body cells to behave like stem cells
Injecting stem cells from a healthy person into an unhealthy person
Cancer is a disease caused when:
Cells divide too slowly
The wrong cells are growing in the wrong place
Cells are dividing in an uncontrolled manner
Cells are dying before they complete mitosis
What part of the cell cycle ensures that DNA replication is error free?
Interphase
Mitosis
Cytokinesis
Check points
