Heredity Review Part One Question Preview (ID: 25587)


Use This To Help You Prepare For The Heredity Test. There Are 20 Questions Loaded But I Think You Only Get 10 Per Game. SO...you Can Play A Couple Times. Play Part Two For 20 More Review Questions! TEACHERS: click here for quick copy question ID numbers.

The process that occurs in sex cells (sperm and egg) by which the number of chromosomes is reduced by half is called
a) fertilization
b) meiosis
c) heredity
d) genetics

An organism's genetic makeup or allele combination is its
a) homozygous
b) genotype
c) heterozygous
d) phenotype

An allele that is masked when a dominant allele is present is called a(n)
a) codominant
b) dominant
c) recessive
d)

Having two identical alleles for a trait is called
a) hybrid
b) homozygous
c) mutation
d) heterozygous

What does the notation TT mean to geneticists?
a) two recessive alleles
b) at least one dominant allele
c) heterozygous alleles
d) two dominant alleles

If a heterozygous black guinea pig (Bb) and a homozygous white guinea pig (bb) are crossed, what is the probability that an offspring will have black fur? (on the test you will use a Punnett square to show your work)
a) 0%
b) 25%
c) 50%
d) 75%

Which stage of meiosis? Chromosome pairs line up in the middle and then the pairs separate and move to opposite ends creating two new cells
a) start
b) meiosis 1
c) meiosis 2
d) end

RNA that copies the coded message from DNA in the nucleus and carries the message into the cytoplasm
a) messenger RNA
b) transfer RNA
c)
d)

The nitrogen base that pairs up with thymine?
a) uracil
b) cytosine
c) guanine
d) adenine

An organism's physical appearance, or visible traits is its
a) homozygous
b) genotype
c) heterozygous
d) phenotype

Priest who studied pea plants; who is also known as the father of genetics.
a) Isaac Newton
b) Walter Sutton
c) Reginald Punnett
d) Gregor Mendel

A __ letter represents the dominant allele of a gene
a) capital
b) lowercase
c)
d)

Having two different alleles for a trait is called
a) heterozygous
b) purebred
c) homozygous
d) mutation

Which stage of meiosis? Chromosomes line up in the center and then the single chromosomes separate and move to opposite ends
a) start
b) meiosis 1
c) meiosis 2
d) end

In the genetic code, groups of three DNA bases codes for one specific
a) gene
b) amino acid
c) protein
d) chromosome

Which of the following are examples of phenotypes?
a) BB, Hh, tt, Aa, dd, Rr
b) smile dimples, tall height, green seeds, widow's peak
c)
d)

According to the chromosome theory of inheritance, ____ are carried from parents to offspring on chromosomes.
a) alleles
b) chromosomes
c) genes
d) traits

An allele whose trait always shows up in the organism when the allele is present called a(n)
a) recessive
b) dominant
c)
d)

Which of the following examples are homozygous?
a) Aa
b) AA
c) aa
d) both answers AA and aa

The offspring of many generations that have the same traits are said to be
a) hybrid
b) homozygous
c) purebred
d) heterozygous

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