Four of the five statements listed below provide
evidence that genes are located on chromosomes.
Select the exception.
a. The chromosome number is cut in half by
meiosis.
b. The original chromosome number is restored by
fertilization.
c. Some genes tend to be inherited together.
d. Environmental factors may influence gene
expression.
e. There are two sets of chromosomes, one
maternal, one paternal, in diploid forms.
Answer: d
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Which of the following lists the female reproductive structures that sperm will pass through on their way to fertilize an oocyte, in the correct order?
a. cervix.. vagina..oviduct...ovary b. cervix...oviduct...vagina...uterus c. uterus...cervix...vagina...ovary d. vagina...cervix...uterus....oviduct
Microbes that are harmless or even beneficial on the
body’s surfaces may cause __________ if they enter the body. a. ulcers b. meningitis c. brain abscesses d. various cancers e. all of these
The heritability of a trait is the ____
a. sum of all phenotypic variation in a population b. average amount of genetic variation in each individual c. proportion of phenotypic variation that is caused by different genotypes d. absolute measurement of genotypic variation in a population e. proportion of phenotypic variation that is caused by the environment
In mammals, the ____ is a temporary center for the formation of blood cells
a. amnion b. allantois c. yolk sac d. chorion e. archenteron