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In rabbits, there are four different versions of the gene for coat color. What pattern of inheritance is this? multiple alleles.
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Gametes are produced by the process of
meiosis.
A breed of chicken shows incomplete dominance for feather color. One allele codes for black feathers, another codes for white
feathers. The feathers of heterozygous chickens of this breed
will be
Gray.
In rabbits, there are four different versions of the gene for coat color. What pattern of
inheritance is this?
multiple alleles.
When Gregor Mendel crossed a tall plant with a short plant, the F1 plants inherited ___
allele from each parent.
one
If an organism’s diploid number is 46, its haploid
number is
23
What are the only kinds of cells that undergo meiosis?
sex cells, gametes
This diagram shows
incomplete dominance
When you flip a coin, what is the probability that it will
come up tails?
50%
What is the probability that a cross between parents who are both homozygous recessive for
trait will have offspring that are homozygous recessive for
that trait?100%
Variation in human skin color is an example of
polygenic traits.
Organisms that have two different alleles for a particular
trait are said to be
heterozygous.
Which of the following supports the claim that the environment can affect genetic traits?a. Pinion trees bear cones every other year.b. Dandelion plants are self pollinating. c. Oak trees get taller as they grow.d. Hydrangea flower color varies with soil pH.
Hydrangea flower color varies with soil pH.
Unlike mitosis, _________results in the
formation of haploid cells.
meiosis
A breed of chicken shows codominance for feather color. One
allele codes for black feathers, another codes for white feathers.
The feathers of heterozygous chickens of this breed will be
speckled.
Chromosomes form tetrads during __________ of meiosis.
prophase I
If two genes are on the same chromosome and rarely assort independently, the genes are
probably located _____close to each other.
Or far apart from each other
close to each other.
The different forms of a gene are called
alleles.
What principle states that during gamete formation genes
for different traits separate without influencing each
other’s inheritance?
principle of independent assortment
A male and female bison that are both heterozygous for normal
skin pigmentation (Aa) produce an albino offspring (aa). Which
of Mendel’s principles explain(s) why the offspring is albino?
dominance and segregation
A tall plant (TT) is crossed with a short plant (tt). If the tall
F1 pea plants are allowed to self-pollinate, the offspring can
be
tall or short.
True or FalseThe farther apart two genes are located on a chromosome, the
less likely they are to be inherited together.
True
True or FalseOne way that meiosis I is
different from mitosis is that meiosis I produces 2 haploid daughter cells, but mitosis
produces 2 diploid daughter cells.
True
A _________ consists of a homologous pair of
chromosomes, each made of two chromatids.
tetrad
four genetically different cells are is formed at the end of
__________
meiosis
A heterozygous tall pea plant is crossed with a short plant. The
probability that an F1 plant will be tall is
50%.
True or FalseGregor Mendel’s principles of
genetics apply to pea plants only.
(False) all organisms
The number of chromosomes in a gamete is represented by
the symbol
N
Situations in which one allele for a gene is not completely dominant over another allele
for that gene are called
incomplete dominance.
Mitosis results in two cells, whereas meiosis results in
_____ cell.
four
Organisms that have two identical alleles for a particular
trait are said to be
homozygous.
The probability that a gamete produced by a pea plant
heterozygous for stem height (Tt) will contain the recessive
allele is _____%
50%
Roan cattle show codominance for the color of their hair. There are
alleles for red hair and white hair. What would you expect a
heterozygous roan bull to look like if the trait showed incomplete
dominance instead?
It would be pink.
An organism has 24 chromosomes in a body cell. After mitosis each cell has 24 chromosomes. After
meiosis each gamete has ____________________
chromosomes.
12
What is being shownCrossing-over
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