Heredity Review Part Two: Question Preview (ID: 25590)

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What does the notation Tt mean to geneticists?
a) homozygous alleles
b) two dominant alleles
c) one dominant allele and one recessive allele
d) two recessive alleles

An organism that has two different alleles for a trait
a) purebred
b) hybrid
c) homozygous
d) recessive

The passing of traits from parents to offspring
a) meiosis
b) fertilization
c) heredity
d) genetics

A mutation is ______ to an organism if it improves the organism’s chances for survival and reproduction.
a) helpful
b) harmful
c) neutral

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

A Punnett square shows two things 1) all the possible _____ and 2) the _____ of a particular outcome
a) combinations, probability
b) combinations, hybrid
c) choices, purebred
d) alleles, genetic

A characteristic that an organism can pass on to its offspring through its genes.
a) gene
b) allele
c) chromosome
d) trait

The different forms of a gene are called
a) chromsomes
b) alleles
c) amino acids
d) protein

A change in a gene or chromosome
a) allele
b) meiosis
c) dominant
d) mutation

The factors that controls a trait (a segment of DNA on a chromosome that codes for a specific trait) is called a
a) allele
b) gene
c) protein
d) chromosome

A ____ letter represents a recessive allele
a) capital
b) lowercase

Which nitrogen base in RNA is NOT part of DNA?
a) cytosine
b) adenine
c) guanine
d) uracil

What is the probability of producing a tall pea plant from a genetic cross between a homozygous short pea plant (tt) and a homozygous tall pea plant (TT) ? (on the test you will use a Punnett square to show your work)
a) 25%
b) 50%
c) 75%
d) 100%

What step in protein synthesis? messenger RNA enters the cytoplasm and attaches to a ribosome
a) Step 1
b) Step 2
c) Step 3
d) Step 4

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

________ control the production of proteins, which help determine traits
a) Chromsomes
b) Traits
c) Genes
d) Proteins

The RNA in the cytoplasm that carries an amino acid to the ribosome and adds it to the growing protein chain?
a) messenger RNA
b) transfer RNA

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

A mutation is _____ to an organism if it reduces the organism’s chances for survival and reproduction
a) helpful
b) harmful
c) neutral

Which of the following examples are heterozygous?
a) Aa
b) AA
c) aa
d) Both AA and aa

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