Mendelian Genetics Question Preview (ID: 60835)
Mendelian Genetics.
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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) 0
b) 2
c) 4
d) 8
If a BB parent is crossed with a bb parent, how many offspring would show the dominant trait?
a) None of them.
b) 1/4
c) 1/2
d) All of them.
When the two alleles of a gene are different, the gene is _____.
a) dominant
b) heterozygous
c) homozygous
d) chromosomal
Who is considered to be the father of modern genetics?
a) Charles Darwin
b) Erwin Chargaff
c) Francis Crick
d) Gregor Mendel
If a TT parent is crossed with a Tt parent, how many offspring would we expect to be Tt?
a) 1/4
b) 1/2
c) 3/4
d) All of them.
Which of the following is NOT visible when looking at an organism?
a) the physical expression of a gene
b) the organism's phenotype
c) the organism's genotype
d) the organism's traits
When the two alleles of a gene are exactly the same, the gene is _____.
a) dominant
b) heterozygous
c) homozygous
d) chromosomal
An organisms physical appearance is called the _____.
a) genotype
b) phenotype
c) chromosomal combination
d) allele
A segment of a chromosome that contains the genetic information for a single trait such as flower color is a/an _____.
a) chromosome
b) gene
c) allele
d) centromere
A trait that masks another trait is _____.
a) dominant
b) recessive
c) strange
d) normal
A version of a gene that controls a trait is a/an _____.
a) chromosome
b) gene
c) allele
d) centromere
Which genotype would cause an individual to express a recessive trait?
a) Bb
b) aa
c) green eyes
d) FF
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 only be expressed (show) when an individual inherits 2 recessive alleles.
d) Recessive traits will always be expressed (show) when the recessive allele is inherited from the mother.
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.
The combination of alleles an organism inherited from its parents is called the _____.
a) genotype
b) phenotype
c) allelic frequency
d) genetic combination
What is a trait?
a) your DNA
b) common characteristics in a species
c) a genetic characteristic that make an individual unique
d) chromosomes
How many genes are being studied in a monohybrid cross?
a) 0
b) 1
c) 2
d) 3
Long strands of DNA are called _____.
a) RNA.
b) chromosomes.
c) phenotypes.
d) proteins.
What tool is used to predict what traits offspring will have?
a) Punnett square
b) DNA electrophoresis
c) Karyotype
d) Amniocentesis
Which of the following tools provided a visual image of all of an organism's chromosomes?
a) Punnett square
b) DNA electrophoresis
c) Karyotype
d) Amniocentesis
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