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Bio ch 11 T/F and fill in the blank, Chapter 11
Terms in this set (78)
T/F specific trait characteristic that
from 1 person to another
T/F Gregor Mendel concluded that all tall plants in the P generation pad the factor for
in the F1 generation
T/F An organism with a dominant allele will
exhibit the trait
T/F A true-breeding plant that produces axel flowers was crossed with a true-breeding plant that produced terminal flowers the resulting offspring produced terminal flowers because the allele for purple flowers is
T/F When alleles segregate from each other, they
T/F if the alleles for a trait did not segregate during gamete formation offspring would
show the trait of at least one of the parents
T/F the principles of probability
the numerical results of Mendel's experiments
T/F The probability that a gamete produced by a pea plant that is heterozygous for tall will contain the recessive allele that is
T/F I'd 2 speckled chickens were mated according to the principle of Codominance
of the offspring are expected to be speckled
T/F Coat color in rabbits is determined by a single gene that has
T/F I'd an organism has 16 chromosomes in each egg the
cell number is 32
T/F if an organism is heterozygous for a particular gene the 2 different alleles will be separated during
T/F mitosis results in 2 cells whereas meiosis results in
False; 4 cells
T/F if an organism has 4 linkage groups it has
T/F genes in the same linkage group are usually inherited
The plants that Gregor Mendel crossed to produce the F1 generation are ______
The different forms of a gene are called _______
If the allele for shortness was dominant the lead plants in Mendel's experiments would all be ________
If the alleles for a trait in pea plants did not segregate during gamete formation offsprings that were recessive for a trait can be produced only by crossing 2 plants that are ____________ for that trait
TT & Tt
_____________ is the likelihood that a particular event would occur
If you flip a coin 5 times and it comes heads every time the probability that the next will he heads is _______
The punnet square above the genotype of the offspring are all ___________
Pea plants that are TT, ____________________, or tt have different genotypes.
When 2 heterozygous tall pea plants are crossed, the expected genotype ratio of the offspring is __________.
1TT 2Tt 1tt
The principle of independent assortment states that _______________ for different traits can segregate independently during the formation of gametes
crossing a pink flower with a white flower will produce pink flower offspring and ________ flowers
Crossing over occurs during the stage of meiosis called ______________
prophase I of meiosis I
The relative location of each known gene can be shown on a ________ map
A trait is a specific characteristic that (varies) from one individual to another.
Gregor Mendel concluded that the tall plants in the P generation passed the factor for (tallness) to the F1 generation
An organism with a dominant allele for a particular form of a trait will (sometimes) show that trait
True-breeding plants that produced axial flowers were crossed with true-breeding plants that produced terminal flowers. The resulting offspring produced terminal flowers because the allele for terminal flowers is (recessive)
When alleles segregate from each other, they (join)
If the alleles for a trait did not segregate during gamete formation, offspring would (always) show the trait of at least one of the parent
The principles of probability can (explain) the numerical results of Mendel's experiments
The probability that a gamete produced by a pea plant heterozygous for stem height (Tt) will contain the recessive allele is (100%)
If roan cows and roan bulls are mated, according to the principle of codominance, (25%) of the offspring are expected to be roan
Coat color in rabbits is determined by a single gene that has(multiple alleles)
If an organism has 16 chromosomes in each of its egg cells, the organism's (diploid) number is 32
If an organism is heterozygous for a particular gene, the two different alleles will be separated during (anaphase II) of meiosis, assuming that no crossing-over has occurred
false- anaphase I
Mitosis results in two cells, whereas meiosis results in (one cell)
false- 4 cells
The plants that Gregor Mendel crossed to produce the F1 generation made up the ____________________ generation.
The different forms of a gene are called ____________________.
If the allele for shortness in pea plants were dominant, all the pea plants in Mendel's F1 generation would have been ____________________.
If the alleles for traits in pea plants did not segregate during gamete formation, offspring that were recessive for a trait could be produced only by crossing two plants that were ____________________ for that trait.
____________________ is the likelihood that a particular event will occur.
If you flip a coin five times and it comes up heads each time, the probability that it will come up heads the next time is ____________________.
50% or 1/2
In the Punnett square shown in Figure 11-1, the genotypes of the offspring are ____________________.
TT and Tt
When two heterozygous tall pea plants are crossed, the expected genotype ratio of the offspring is _________________________.
1TT : 2Tt : 1tt
The principle of independent assortment states that ____________________ for different traits can segregate independently during the formation of gametes.
If pea plants that are homozygous for round, yellow seeds (RRYY) were crossed with pea plants that are heterozygous for round, yellow seeds (RrYy), the expected phenotype(s) of the offspring would be _________________________.
round, yellow seeds
Crossing a pink-flowered four o'clock with a white-flowered four o'clock will produce pink-flowered offspring and ____________________-flowered offspring.
An organism's gametes have ____________________ the number of chromosomes found in the organism's body cells.
Crossing-over occurs during the stage of meiosis called ____________________.
The relative locations of each known gene can be shown on a ____________________ map.
If a pea plant has a recessive allele for green peas, it will produce
green peas if it does not also have a dominant allele for yellow peas.
If a pea plant's alleles for height are tt, what is true of its parents?
Both parents contributed a recessive allele
When Gregor Mendel crossed true-breeding tall plants with true-breeding short plants, why was it impossible to observe segregation?
Alleles in the F1 must be Tt to have height variety in the F2.
When you flip a coin, what is the probability that it will come up tails?
The principles of probability can be used to
predict the traits of the offspring of genetic crosses.
A heterozygous tall pea plant is crossed with a short plant. The probability that an F1plant will be tall is
Gregor Mendel's principles of genetics apply to
Situations in which one allele for a gene is not completely dominant over another allele for that gene are called
In rabbits, there are four different versions of the gene for coat color. What pattern of inheritance is this?
Variation in human skin color is an example of
If an organism's diploid number is 12, its haploid number is
A tetrad consists of
a homologous pair of chromosomes, each made of two chromatids.
Unlike mitosis, meiosis results in the formation of
One way that meiosis I is different from mitosis is that
meiosis I produces 2 haploid daughter cells, but mitosis produces 2 diploid daughter cells.
Gene maps are based on
the frequencies of crossing-over.
If Mendel had found that an F2 cross of plants that were heterozygous for two traits had made offspring with two phenotypes, this finding would have (supported) the theory of independent assortment.
If two speckled chickens are mated, according to the principle of codominance, (25%) of the offspring are expected to be speckled.
An organism has 38 chromosomes in a body cell. After mitosis each cell has 38 chromosomes. After meiosis each gamete has ____________________ chromosomes
What is the probability of flipping a coin and getting heads 5 times in a row?
1/2 x 1/2 x 1/2 x 1/2 x 1/2 = 1/32
____________________'s principles can be used to study heredity in dogs, cats and sheep.
The characteristics of an organism are determined by two factors: ____________________.
genes and environmental conditions
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