The process by which sperm and ovum combine to create a single cell called a zygote is fertilization or conception conception or parturition pregnancy.
What is the cervix the opening of the uterus the opening of the vagina the opening of the fallopian tubes.
when fertilization does nor occur, the ovum and any sperm cells in the woman's body die. What happens with those sperm cells? they are absorbed by the woman's white blood cells they pass through the uterus and exit through the vagina they are absorbed by the ovums.
what is not true according with the monozygotic twins they share 100% of genes so they are generally identical are the result from the cleaving of one fertilised egg are more common than dizygotic twins.
dizygotic twins are also called parental twins fraternal twins identical twins.
the study of heredity genetics human development epigenesis.
heredity is the genetic transmission of heritable characteristics from parents to offspring the group of alternate versions of the same gene the chemical molecules attached to a gene that alter the way a cell reads the gene's DNA.
coils of DNA carrying genes alleles chromosomes bases.
what's is false according to epigenesis genes are turned off or on as they are needed by the developing body or when triggered by the environment. This phenomenon is called epigenesis or epigenetic epigenetic framework are chemical molecules that alter the way a cell reads the gene's DNA ilustrates the action of nature or nurture influences and how they mutually and reciprocally affect outcomes.
which of these is false? defects transmitted by dominant inheritance are less likely to be lethal at an early age recessive defects are expressed only if the child is homozygous defects transmitted by recessive inheritance are less likely yo be lethal.
what's is not true about incomplete dominance a trait is not fully expressed the resulting phenotype is a combination of both genes some examples are: red/green colour blindness and haemophilia.
Which is false? chromosomal abnormalities can be the result of errors in cell division chromosomal abnormalities result in missing or extra chromosomes chromosomal abnormalities occur only in sex chromosomes.
actual genetic makeup or allele combinations genotype phenotype multifactorial transmission.
observable expression of genetic makeup epigenetics phenotype genotype.
interaction of several genes for a trait polygenic inheritance multifactorial transmission incomplete dominance.
genomics is the scientific study of the functions and interactions of various genes is the statistical estimate of heritable influence on trait variance in a population is the genetic transmission of heritable characteristics from parents to offspring.
heritability can be measured by family studies, adoption studies and twin studies family studies, culture studies and adoption studies family studies, twin studies and culture studies.
heritability is the scientific study of the functions and interactions of various genes the statistical estimate of heritable influence on trait variance in a population the degree to which monozygotic and dizygotic twins resemble each other for a trait.
the degree to which monozygotic and dizygotic twins resemble each other for a trait concordance codominance heritability.
refers to a range of potential expressions of a heritability trait reaction range canalization inheritance.
Choose the incorrect one: many highly canalised traits tent to be those necessary for survival; they are too important to be left to chance cognition and personality are highly canalized it would take an extreme change in environment to alter the course of the high catalysed traits.
parents provide environment that fosters trait passive genotype-environment correlation reactive or evocative genotype-environment correlation active or niche picking genotype-environment correlation.
based on their traits, children evoke different responses form others passive genotype-environment correlation reactive or evocative genotype-environment correlation active or niche picking genotype-environment correlation.
choosing an environment that suits your traits passive genotype-environment correlation reactive or evocative genotype-environment correlation active or niche picking genotype-environment correlation.
period between conception and birth, normally between 37 and 41 weeks gestation conception parturition.
usually dated from the first day of an expectant mother's last menstrual cycle gestational age conceptional age birth age.
Which is the correct orden of the stages of prenatal development? germinal, embryonic and fetal germinal, fetal and embryonic fetal, germinal and embryonic.
germinal stage is from conception to 2 weeks 2 to 8 weeks 8 weeks to birth.
embryonic stage is from conception to 2 weeks 2 weeks to 8 weeks 8 weeks to birth.
fetal stage is from conception to 2 weeks 2 to 8 weeks 8 weeks to birth.
an environmental agent which can interfere with normal development is a teratogen mutation disorder.
includes education, social services and nutritional services prenatal care preconception care prefetal care.
includes physical examinations, vacations, risk screening and counselling prenatal care preconception care prefetal care.
he heart develops and starts to beat on a spontaneous way to distribute food and oxygen week 3 week 8 week 10.
outbreak of the nervous system: neural cells conform the brain but this organ has not body control yet week 3 week 8 week 10.
the embryo is now named fetus week 3 week 6 week 8.
the placenta is mature enough to be the responsible of feeding the fetus (via bloodstream) week 3 week 6 week 8.
first sonography: detection of genetic abnormalities (for example down's syndrome) week 8 week 9 week 10.
stepping reflex week 10 week 11 week 12.
the biggest transformation (5 times) from week 6 to 11 from week 6 to 12 from week 6 to 10.
fetus takes a human aspect week 10 week 11 week 12.
organs development an functioning week 10 week 11 week 12.
risk of abortion is reduced week 13 week 11 week 12.
sex organs get developed and they start to secrete hormones week 11 week 12 week 13.
nervous system spreads over the body week 12 week 16 wheen 11.
the immune system develops week 11 week 12 week 16.
gripping reflex week 16 week 12 week 18.
proprioception is developed (awareness of space) week 12 week 16 week 18.
sense development week 16 week 18 week 24.
central nervous system takes control over body movements and heart week 12 week 16 week 18.
digestive system starts to work and the fetus ingest some amniotic fluid week 16 week 18 week 24.
blinking reflex week 16 week18 week 24.
if the bay is born she could survive with medical assistance. However, there is risk of brain damage because lung cannot take enough oxygen week 22 week 24 week 26.
functional sensorial organs week 18 week 24 week 26.
sucking reflex week 24 week 26 week 28.
anxiety and stress can be passed to the fetus, having a harmful effect on it week 26 week 28 week 24.
fetus is now named by baby week 28 week 30 week 32.
long term memory works week 26 week 28 week 30.
baby starts dreaming week 28 week 30 week 32.
the brain is totally mature week 28 week 30 week 32.
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