Exam 2: Biological Foundations: Heredity, Prenatal Development, and Birth

Down syndrome and Turner's syndrome are two genetic disorders that involve abnormal chromosomes. Identify the exact chromosomal aberration and the impact of the aberration on development for each syndrome.

Hair and skin originally develops in the ectoderm layer of a zygote.

Which parent should most realistically fear her child dying before reaching their first birthday?

Pregnant women who fail to consume enough vitamin A are at risk for giving birth to a baby with spina bifida.

Low birth weight can most effectively be prevented through

Keshia has one allele for curly hair and another for straight hair. Keshia's alleles are

Which statement concerning preimplantation genetic screening (PGS) is false?

For healthy pregnant women, when a trained healthcare professional is present to assist,

Nonshared environmental influences involve forces that make siblings

Thando is a medical student who is learning a procedure in which foetal cells are sampled from the mother's bloodstream. What technique is she most likely learning?

A heritability coefficient of ____ means about 50 per cent of the difference between people on a specific characteristic is the result of heredity.

Describe why in vitro fertilisation and eugenics represent controversial issues in human development.

The condition of hypoxia involves a reduction in the flow of oxygen to the brain.

Which organism can truthfully state, 'It is during my time that all body parts and organs are first put into place?'

DNA is short for ______ acid.

Which is not a typical childbirth class technique for reducing the pain associated with delivery?

Because her birth weight was 1200 grams, Dikeledi would be correctly classified as having a(n) ____ birth weight.

The ____ contains the blood vessels that join the embryo and its mother.

Currently, the earliest 'age of viability' occurs around ____ weeks after conception.

Because it involves prolonged physical effort, the process of childbirth is often referred to as involving stages of