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