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Mendelian Genetics
Test Description: Mendelian Genetics
Instructions: Answer all questions to get your test result.
1) What is a trait?
A
a genetic characteristic that make an individual unique
B
your DNA
C
common characteristics in a species
D
chromosomes
2) The combination of alleles an organism inherited from its parents is called the _____.
A
allelic frequency
B
phenotype
C
genetic combination
D
genotype
3) Which of the following is true about dominant traits?
A
Dominant traits will always be expressed (show) when an individual inherits 1 dominant allele.
B
Dominant traits will only be expressed (show) when an individual inherits 2 dominant alleles.
C
Dominant traits will only be expressed (show) when an individual inherits 2 recessive alleles.
D
Dominant traits will always be expressed (show) when the dominant allele is inherited from the father.
4) Which of the following is true about recessive traits?
A
Recessive traits will only be expressed (show) when an individual inherits 2 dominant alleles.
B
Recessive traits will always be expressed (show) when the recessive allele is inherited from the mother.
C
Recessive traits will only be expressed (show) when an individual inherits 2 recessive alleles.
D
Recessive traits will always be expressed (show) when an individual inherits 1 recessive allele.
5) Which genotype would cause an individual to express a recessive trait?
A
green eyes
B
FF
C
Bb
D
aa
6) A trait that masks another trait is _____.
A
strange
B
dominant
C
normal
D
recessive
7) A version of a gene that controls a trait is a/an _____.
A
centromere
B
chromosome
C
gene
D
allele
8) A segment of a chromosome that contains the genetic information for a single trait such as flower color is a/an _____.
A
centromere
B
gene
C
allele
D
chromosome
9) An organisms physical appearance is called the _____.
A
allele
B
genotype
C
phenotype
D
chromosomal combination
10) Which of the following is NOT visible when looking at an organism?
A
the organism's phenotype
B
the organism's genotype
C
the physical expression of a gene
D
the organism's traits
11) When the two alleles of a gene are exactly the same, the gene is _____.
A
heterozygous
B
homozygous
C
dominant
D
chromosomal
12) When the two alleles of a gene are different, the gene is _____.
A
dominant
B
homozygous
C
chromosomal
D
heterozygous
13) Who is considered to be the father of modern genetics?
A
Charles Darwin
B
Francis Crick
C
Gregor Mendel
D
Erwin Chargaff
14) If a TT parent is crossed with a Tt parent, how many offspring would we expect to be Tt?
A
1/2
B
3/4
C
All of them.
D
1/4
15) If a BB parent is crossed with a bb parent, how many offspring would show the dominant trait?
A
1/2
B
1/4
C
All of them.
D
None of them.
16) A mom has brown eyes (Bb) and a father has blue eyes (bb). If the parents have 8 children, how many would be expected to have blue eyes?
A
4
B
0
C
2
D
8
17) How many genes are being studied in a monohybrid cross?
A
3
B
2
C
1
D
0
18) Long strands of DNA are called _____.
A
chromosomes.
B
proteins.
C
RNA.
D
phenotypes.
19) What tool is used to predict what traits offspring will have?
A
Karyotype
B
Punnett square
C
DNA electrophoresis
D
Amniocentesis
20) Which of the following tools provided a visual image of all of an organism's chromosomes?
A
DNA electrophoresis
B
Punnett square
C
Amniocentesis
D
Karyotype
*select an answer for all questions
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