11) Autosomal chromosomes
a) come in pairs containing one large and one small chromosome.
b) come in pairs of chromosomes that are about the same size.
c) determine the sex of a child.
d) have an X and a Y chromosome.
12) Sex chromosomes
a) do not come in pairs.
b) come in pairs of chromosomes that are about the same size.
c) determine the sex of the child.
d) are the first 22 pairs of chromosomes.
13) Kelly and Ruben just had a baby boy. If they could look at their baby’s sex chromosomes, they would see
a) one X and one Y chromosome.
b) two Y chromosomes.
c) one Y chromosome only.
d) two X chromosomes.
14) Chromosomes consist of
a) eggs and sperm.
b) phenotypes.
c) alleles.
d) deoxyribonucleic acid.
15) Each group of nucleotide bases that provides a specific set of biochemical instructions is called a
a) phenotype.
b) gene.
c) chromosome pair.
d) recessive allele.
16) Blueprints are to a completed house as ________ are to ________.
a) phenotypes; genotypes
b) genotypes; phenotypes
c) recessive genes; dominant genes
d) dominant genes; recessive genes
17) An individual’s physical, behavioural, and psychological features are known as one’s
a) phenotype.
b) deoxyribonucleic acid.
c) genotype.
d) genes.
18) Which of the following is the best example of a phenotype?
a) blue eyes
b) an allele for sickle-shaped cells
c) an XX chromosome pattern
d) codominant genes
19) The complete set of genes that makes up a person’s heredity is called
a) an allele.
b) deoxyribonucleic acid.
c) a genotype.
d) a phenotype.
20) Alleles
a) in a chromosome pair are always identical.
b) in a chromosome pair are always different.
c) in a chromosome pair are sometimes identical and sometimes different.
d) occur singly, not in pairs.
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