Indicate whether the sentence or statement is true or false.
The law of segregation states that two or more pairs of alleles separate independently of one
another during gamete formation.
Cells that contain a single set of chromosomes are said to be haploid (N).
Crosses involving a study of one gene are called monohybrid crosses.
A dominant allele masks the effect of a recessive allele.
Mendel concluded that the patterns of inheritance are determined entirely by the environment.
A Punnett square represents the phenotype of an organism.
The physical appearance of an individual organism, as determined by the genes it has inherited from its parents, is called its genotype.
Individuals must exhibit a trait in order for it to appear in their offspring.
In codominance, two alleles are expressed at the same time.
Identify the letter of the choice that best completes the statement or answers the question.
In fruit flies, the gene for long wings, L, is dominant to the gene for short wings, l. A heterozygous long wing male and a short wing female produce many offspring. The possible genotype(s) among the long-winged offspring is (are)
In drosophila, curled wing is recessive to straight wing. If a homozygous straight-winged fly is mated with a curled-wing fly, how many different phenotypes will be produced?
If an organism has two identical alleles for a trait, it is
Alleles for the same trait separate during
The inheritance of genes that determine one trait (hair color) is not affected by the inheritance of genes that control another trait (tongue rolling). Which of Mendel’s rules apply to the above statement?
In fruit flies, the gene for straight wings, C, is dominant to the gene for curly wings, c. Two flies, when bred, produced 98 straight-winged and 102 curly-winged offspring. What was the genotype of the curly-winged offspring?
All homozygous individuals have:
If a family has three daughters, the probability that the next child will be a girl is
Mendel explained the reappearance of recessive traits in the F2 generation in his principle of
If any offspring from a test cross show a recessive phenotype, the parent with the unknown genotype is
A homozygous black rabbit is mated with a heterozygous rabbit. If black is dominant over white, they should produce:
Mendel’s finding that the inheritance of one trait had no effect on the inheritance of another became known as the
The phenotype of an organism
In humans the ability to taste PTC paper is dominant to non-tasting and hair color shows incomplete dominance (Dark hair x blond hair => brown hair). A brown haired man who cannot taste PTC paper marries a woman with brown hair and who can taste PTC paper. Their first child had brown hair and could not taste PTC paper. What are the chances that their next child will be a brown taster?
Two long-furred cats were mated and produced 25 percent short-furred cats. The parents were probably:
When certain types of black roosters are crossed with white hens, speckled chickens result. These chickens, which have a mixture of black and white feathers, show
codominance : both traits are displayed::
A Punnett square is used to determine the
If a family has four sons, the probability that the next child will be a boy is
Suppose that on Mars green creatures are dominant over red creatures and that 3-eyes are recessive to 4-eyes. Assume that inheritance of traits on Mars occurs the same way as on Earth. A cross between 2 GgEe Martians would result in what fraction of the offspring being red-3-eyed Martians?
The fact that a man and woman, both of whom have wavy hair, could have children with curly hair, wavy hair, or straight hair is best explained by the phenomenon called
A Punnett square does not show the
The “father” of genetics was
What is the probability that the offspring of a homozygous dominant individual and a homozygous recessive individual will exhibit the dominant phenotype?
Which of the following is the designation for Mendel’s original pure strains of plants?
F2 : F1 ::
The passing of traits from parents to offspring is called
homozygous : heterozygous ::
The phenotype of an organism
If an individual has two recessive alleles for the same trait, the individual is said to be
Tallness (T) is dominant to shortness (t) in pea plants. Which of the following represents a genotype of a pea plant that is heterozygous for tallness?
How many different phenotypes can be produced by a pair of codominant alleles?
Refer to the illustration above. The genotype represented by the cell labeled “2” is
In rabbits, black fur (B) is dominant to brown fur (b). Consider the following cross between two rabbits.
Refer to the illustration above. Both of the parents in the cross are
Refer to the illustration above. The genotypic ratio of the F1 generation would be
In pea plants, yellow seeds are dominant over green seeds. What would be the expected genotype ratio in a cross between a plant with green seeds and a plant that is heterozygous for seed color?