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Questions and Answers
Pollination can best be described as:
Pollination can best be described as:
- The fusing of the egg nucleus with the pollen nucleus.
- The type of cell division that produces diploid gametes.
- The formation of the male and female sex cells.
- The transfer of male pollen grain to the pistil of a flower. (correct)
The gamete that contains genes contributed by the mother is:
The gamete that contains genes contributed by the mother is:
- Dominant.
- An egg. (correct)
- A sperm.
- A zygote.
Cells containing two alleles for each trait are described as:
Cells containing two alleles for each trait are described as:
- Haploid.
- Homozygous.
- Gametes.
- Diploid. (correct)
The statement: 'In meiosis, the way in which a chromosome pair separates does not affect the way other pairs separate', is another way of expressing Mendel's law of:
The statement: 'In meiosis, the way in which a chromosome pair separates does not affect the way other pairs separate', is another way of expressing Mendel's law of:
A white mouse whose parents are both white produces only brown offspring when mated with a brown mouse. The white mouse is most probably:
A white mouse whose parents are both white produces only brown offspring when mated with a brown mouse. The white mouse is most probably:
Polyploid organisms result from:
Polyploid organisms result from:
The processes occurring at A and B are:
The processes occurring at A and B are:
If a female guinea pig homozygous dominant for black fur color is mated with a male that is homozygous recessive for white fur color, in a litter of eight offspring, you would expect:
If a female guinea pig homozygous dominant for black fur color is mated with a male that is homozygous recessive for white fur color, in a litter of eight offspring, you would expect:
A dog's phenotype can be determined by:
A dog's phenotype can be determined by:
A couple has two children, both of whom are boys. What is the chance that the parents' next child will be a boy?
A couple has two children, both of whom are boys. What is the chance that the parents' next child will be a boy?
___ is the different forms of a gene.
___ is the different forms of a gene.
___ is the alleles present for a trait are the same.
___ is the alleles present for a trait are the same.
___ is the cell that contains one member of each chromosome pair.
___ is the cell that contains one member of each chromosome pair.
___ is the type of cell division that produces gametes.
___ is the type of cell division that produces gametes.
___ is the cell produced when a male gamete fuses with a female gamete.
___ is the cell produced when a male gamete fuses with a female gamete.
___ is the uniting of the male and female gametes.
___ is the uniting of the male and female gametes.
___ is the exchange of genetic material between nonsister chromatids.
___ is the exchange of genetic material between nonsister chromatids.
__ is the failure of homologous chromosomes to separate properly during meiosis.
__ is the failure of homologous chromosomes to separate properly during meiosis.
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Study Notes
Pollination and Gametes
- Pollination is the transfer of male pollen grains to the pistil of a flower.
- Eggs are the gametes that contain genes contributed by the mother.
Genetic Terms and Concepts
- Diploid cells contain two alleles for each trait.
- The concept of independent assortment states that the separation of one chromosome pair does not affect other pairs.
- Homozygous recessive refers to an organism that has two identical alleles for a recessive trait.
Inheritance Patterns
- A white mouse mated to a brown mouse producing only brown offspring suggests the white mouse is homozygous recessive.
- Polyploid organisms arise from nondisjunction, where chromosomes fail to separate properly.
Cellular Processes
- In a sequence of chromosome numbers in dog cells, the processes of meiosis and fertilization are occurring at designated points.
- Mating a homozygous dominant female guinea pig with a homozygous recessive male results in offspring that are all black.
Determining Phenotypes
- The phenotype of a dog can be identified by visually examining the dog itself.
- The likelihood of a couple having another boy after already having two sons is statistically 50%.
Genetic Definitions
- Alleles are different forms of a gene.
- Homozygous refers to having identical alleles for a specific trait.
- Haploid cells contain only one member of each chromosome pair.
- Meiosis is the type of cell division resulting in gametes.
- A zygote is formed when a male and female gamete unite.
- Fertilization describes the joining of male and female gametes.
- Crossing over is the genetic material exchange between nonsister chromatids.
- Nondisjunction is the failure of homologous chromosomes to separate properly during meiosis.
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