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WorksheetsConception, Heredity and the Environment
Total questions: 11
Worksheet time: 8mins
The most common cause of infertility in men is toxins in the environment.
False
True
In conception, the moment when genes are combined and a new individual is formed is...
when the fertilized egg implants in the uterus.
when the sperm breaks through the egg and fuses with it.
during meiosis.
when the zygote starts replicating itself.
In vitro fertilization involves:
A. Injecting sperm directly into a woman's vagina, cervix or uterus.
B. Injecting a woman with a variety of hormones to stimulate egg production.
C. The removal and fertilization of a woman's eggs, and then implanting this back into the woman's uterus.
B and C
The most common cause of infertility in women is blockage of the fallopian tubes.
True
False
Which is the best analogy for what genes do?
A set of on/off buttons on a switchboard.
A large balloon that fills and deflates on a cycle.
A set of instructions for making a person.
Humans have (a) pairs of chromosomes.
Humans have ____ pairs of autosomes and ____ pair/pairs of sex chromosomes.
22
10
1
13
Males are XX and females are XY.
False
True
Under what condition would a recessive trait be displayed?
When both genes in a pair are recessive.
When both genes in a pair are dominant.
When the first gene in a pair is recessive and the second is dominant.
When the first gene in a pair is dominant and the second is recessive.
A child's adoptive parents are short in stature, yet the child is growing tall like his biological mother. What might we conclude about the child's height?
It is influenced primarily by environment.
It is influenced primarily by heredity.
Nutrition did not influence his height.
Cystic Fibrosis is a sex-linked inherited defect.
True
False
