Genetics Test Review Question Preview (ID: 41335)

Review Of Key Terms And Processes You Should Understand From Out Genetics Unit.[print questions]

A student wants to cross parent mice to produce offspring with black fur and offspring with white fur. If black fur color (B) is dominant to white fur (b), what should be the genotypes of the parent mice?
a) BB and BB
b) bb and bb
c) BB and Bb
d) Bb and Bb

Two heterozygous tall plants (Tt) are crossed. What are the expected genotypes and percentages of this cross?
a) TT 50%; Tt 50%
b) TT 25%; tt 75%
c) TT 25%; Tt 50%; tt 25%
d) Tt 25%; TT 50%; 25%

In guinea pigs, the allele for rough coat (R) is dominant to the allele for smooth coat (r). A heterozygous guinea pig is crossed with a homozygous recessive guinea pig. What percentage of offspring will be homozygous recessive?
a) 100%
b) 50%
c) 25%
d) 0%

What percentage of offspring from a cross between a homozygous Type A parent with a heterozygous Type A parent is expected to contain the i allele?
a) 25%
b) 50%
c) 75%
d) 100%

In a certain species of rabbits, black coat color is dominant over brown coat color. What is the probability of producing a rabbit with brown coat color from two rabbits that are both heterozygous with black coat color?
a) 100%
b) 75%
c) 25%
d) 0%

A method of quickly producing genetically identical plants and animals is
a) cloning
b) embryo transfer
c) genetic engineering
d) selective breeding

Genes code for specifically structured
a) acids
b) lipids
c) sugars
d) proteins

Which DNA structure provides a set of instructions for a cell to make specific proteins?
a) gene
b) cell
c) nucleus
d) ribosome

What types of cells are found only in organisms that reproduce sexually?
a) blood cells
b) gametes
c) skin cells
d) prokaryotic cells

Why does sexual reproduction result in more genetic diversity than asexual reproduction?
a) Traits from two parents are combined
b) More organisms reproduce this way
c) Offspring come from identical parents
d) Reproduction occurs quickly

Which of these is accomplished by the interaction of haploid cells in sexually reproducing organisms?
a) production of offspring with identical chromosomal combinations from both parents
b) elimination of genes that selection pressures are acting against
c) deletion of genetic material that has mutated
d) production of a zygote with a complete set of chromosomes with genetic material from two parents

Which genetic mutation can be passed to the offspring?
a) Excessive sun exposure causes uncontrolled mitosis in skin cells
b) The DNA of a lung cell is damaged by exposure to cigarette smoke
c) A gamete containing an extra chromosome is formed.
d) A cell of a reproductive organ contains a damaged chromosome.

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