WorksheetsGenetics End of Unit
Total questions: 33
Worksheet time: 17mins
The trait that is "hidden" and does not show up in the person's phenotype.
DNA
dominant
recessive
genes
Freckles (F) are dominant to not having freckles (f). The diagram shows the cross of a homozygous dominant parent (FF) with a parent of an unknown genotype for freckles. What is the unknown genotype and phenotype for the parent?
homozygous dominant with freckles
homozygous recessive without freckles
heterozygous with freckles
heterozygous without freckles
Molecules in a "double helix" shape that carry instructions for development.
DNA
dominant
heredity
recessive
The passing of traits from parents to offspring.
DNA
heredity
recessive
dominant
Inherited characteristics an offspring gets from parents.
homozygous
heterozygous
chromosomes
traits
Different forms of a gene that are passed on from each parent and determine an offspring's traits.
homozygous
chromosomes
alleles
traits
Bundled cell structures made of DNA that control for protein production. Shaped like an X, hold genetic information.
homozygous
heterozygous
chromosomes
traits
A combination of the same type of gene (either both dominant or both recessive).
homozygous
heterozygous
chromosomes
alleles
Of the following characterstics, which is not genetic?
Naturally red hair
hitchhiker's thumb (bends backwards)
ability to roll tongue
Tattoo
A form of asexual reproduction where a new organism is formed by a cell (or group of cells) pinching off from the original organism (the parent).
mitosis
budding
meiosis
selective breeding
Which is the GREATEST benefit of sexual reproduction?
capable of reproducing by meiosis
ability to reproduce without a mate
ability to produce genetically different offspring
capable of producing offspring genetically identical to parent
What best describes the shape of a DNA molecule?
double helix
Punnett Square
karyotype
triple cone
The sperm and egg cells (gametes), each give _________ chromosomes to the new cell during fertilization.
2
23
32
46
Which is a form of sexual reproduction?
fertilization
mitosis
budding
A child’s sex (biological gender) is determined by the PASSING OF sex chromosomes BY which person?
grandfather
grandmother
father
mother
Two black guinea pigs were crossed, and they produced a litter of 4 black and 3 white guinea pigs. Which best explains this occurrence?
White fur was the result of a mutation.
White fur is dominant to black fur.
Both parents were heterozygous for black fur.
Both parents were homozygous for black fur.
What process of cell production make two identical daughter cells and allows you to grow and heal wounds? *Hint: My toes itch!!
meiosis
mitosis
hybridization
heredity
The cell process that occurs in the formation of sex cells (sperm and egg), resulting in half the number of chromosomes as the parent.
genetics
incomplete dominance
meiosis
mitosis
If both parents of an offspring are homozygous recessive and have a straight hairline instead of a widow's peak, what is the probability of that offspring having a straight hairline as well?
25%
50%
75%
100%
If a person is a carrier for a trait, which of the following describes their genotype?
homozygous recessive
homozygous dominant
heterozygous
If both parents are heterozygous for the dominant gene of curly hair, what is the chance of their offspring having straight hair?
25%
50%
75%
100%
A chart that tracks a trait as it is inherited through generations is called a ________________.
Punnett Square
pedigree
genetics
heredity
If you have an X-linked sex chromosome disorder, which of the following would most likely be true when looking at inheritance through generations?
There would be carrier females and affected males.
Affected males and females would be the same.
There would be carrier males and affected females.
Males and females would be carriers but not show the trait.
Which factor(s) influence your health?
your genes
your environment
your lifestyle choices
all of these
Which process involves choosing certain organisms to reproduce with one another in order to pass on specific, desirable traits to their offspring?
selective breeding
asexual reproduction
natural selection
codominant
Why would the offspring resulting from fertilization have more differences than the offspring resulting from budding?
Each parent provides half of its genes to its offspring during budding, unlike during fertilization.
Each parent provides half of its genes to its offspring during fertilization, unlike during budding.
If green peas are dominant (G) and yellow peas are recessive (g), the phenotype for a pea plant with the genotype (gg) is green.
True
False
Organisms that are a result of sexual reproduction are MORE ALIKE than organisms that are a result of asexual reproduction.
True
False
Females are more likely to SHOW a recessive sex-linked trait than males, because females only have one X chromosome.
True
False
A phenotype describes the way an organism looks.
True
false
A genotype describes the genetic makeup of an organism and is described in a combination of alleles.
true
false
How would you describe generation 2 in a pedigree?
2 of the boy offspring and 1 girl offspring are carriers of the recessive trait
2 of the girl offspring and 1 boy offspring are carriers of the recessive trait
there are 3 offspring that only carry the dominant trait
there are 7 grandchildren represented in generation 2
The trait that can hide other traits, and is shown in the person's phenotype.
DNA
dominant
heredity
heredity
