Embryology Flashcards
what is morbidity?
non-fatal health loss can be quick or condition that leads to a long term change
(Glasper et al, 2006)
what is mortality?
deaths
(Glasper et al, 2006)
what are the seven stages of life?
birth, infancy, early years, childhood, adolescence, adults, old people
(Glasper et al, 2006)
how many pairs of chromosomes are there?
22 normal chromosomes and 1 pair of sex chromosomes
(Glasper et al, 2006)
what is the genotype?
complete genetic make up of someones
(Glasper et al, 2006)
what is the phenotype?
the way genes are expressed (eye colour, hair colour)
(Glasper et al, 2006)
what is a dominant gene?
it over rules the recessive gene
(Glasper et al, 2006)
what is a recessive gene?
only show their effect if the individual inherits two copies of the allele
(Glasper et al, 2006)
what is bigger: sperm or ovum?
ovum
(Glasper et al, 2006)
what is meiosis?
cell division where number of chromosomes are halved
(Glasper et al, 2006)
what happens once the sperm penetrates the ovum?
fertilises it and combines their genetic material, so restores the 23 complemented pair chromosomes as the sperm and ovum only have 23 single chromosomes each
(Glasper et al, 2006)
where does the zygote go after fertilisation?
moves from fallopian tube to lining of uterus (endometrium)
(Glasper et al, 2006)
what happens once the embryo has implanted?
draws nutrition and support from mother, metabolising and growing
(Glasper et al, 2006)
what are the three cell layers?
ectoderm (posterior), mesoderm (middle), anterior (endoderm)
(Glasper et al, 2006)
what does the ectoderm form?
skin and nervous system
(Glasper et al, 2006)