Science Benchmark 2 Review Question Preview (ID: 17432)


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Genetic makeup of an organism
a) genotype
b) phenotype
c) homozygous
d) heterozygous

A tool that shows the probability for a trait in the offspring
a) Punnett Square
b) dominant allele
c) recessive allele
d) allele

Organisms with two identical alleles for a trait
a) genotype
b) phenotype
c) homozygous
d) heterozygous

Physical appearance of an organism
a) genotype
b) phenotype
c) heterozygous
d) homozygous

What is the genotype of a person with homozygous brown eyes? Hint: Brown is dominant!!!
a) Brown carrying a blue allele
b) bb
c) BB
d) Bb

Organisms with two different alleles for a trait
a) genotype
b) phenotype
c) homozygous
d) heterozygous

What is the allele combination for the female gender?
a) XY
b) XX
c) AA
d) Aa

What is the allele combination for the male gender?
a) XY
b) XX
c) AA
d) Aa

The Father of Genetics
a) Gregor Mendel
b) Robert Hooke
c) Anton Van Leewenhoek
d) Schwann

A heterozygous parent is crossed with a homozygous recessive parent. What is the probability that the offspring will be homozygous recessive?
a) 25%
b) 50%
c) 75%
d) 100%

Of the following, which represents a homozygous recessive genotype?
a) TT
b) Tt
c) tt
d) tTt

In DNA base pairing, adenine is to _____, as guanine is to _____.
a) cytosine, thymine
b) thymine, cytosine
c) guanine, thymine
d) guanine, adenine

Mendel called plants that received different alleles for a trait from each parent ___.
a) hybrids
b) dominant
c) purebred
d) phenotypes

In a punnett square, a capital letter stands for a ___ allele.
a) recessive
b) dominant
c) homozygous
d) heterozygous

A punnett square shows you all the ways in which ____ can combine.
a) alleles
b) eggs
c) sperm
d) color

During _____, the nuclear membrane breaks down into pieces the chromosomes are visible.
a) prophase
b) meiosis
c) regeneration
d) sexual reproduction

Which of the following bases does not belong in DNA
a) adenine
b) cytosine
c) uracil
d) thymine

The chromosomes in the nucleus of a cell contain a genetic code known as
a) the key code
b) DNA
c) meiosis
d) mitosis

Most of the life of any cell is spent in a period of growth called
a) interphase
b) prophase
c) telophase
d) anaphase

A bacterial cell divides in half to make another organism. This is a type of
a) asexual reproduction
b) egg and sperm joining
c) sexual reproduction
d) an allele combination

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