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Pre-Test
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1
When an organism has two different alleles at a gene locus, it is referred to as _____.
A)homozygous recessive
B)homozygous dominant
C)heterozygous
2
Which of the following was discovered by Mendel?
A)linkage
B)the relationship of genetic behavior to laws of probability.
C)the location of genes on chromosomes.
D)the role of chromosomes in sex determination.
3
The word __________ refers to the alleles an individual receives at fertilization.
A)genotype
B)phenotype
C)karyotype
D)lenotype
4
Which of the following is a phenotype?
A)Tt
B)Heterozygous
C)Short
D)T
5
Each gamete has only one allele for each trait because gametes are always _____.
A)haploid
B)diploid
C)triploid





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