Genetics
Heredity
Reproduction
Punnett Squares
Pot Pourri
100
What is genetics?
The study of heredity.
100
What is heredity?
The passage of genetic instructions (traits) from parent to offspring.
100
Reproduction that produces offspring that share traits from both parents
sexual reproduction
100
Some genes can be hidden or covered up by another; these traits reappear in the second generation. These are considered to be-
Recessive
100
What is a feature that has different forms in a population?
Characteristic
200
The different forms (often dominant and recessive) of a gene are known as _______________.
alleles
200
Who first studied heredity and the passage of traits from one generation to the next?
Gregor Mendel
200
Asexual reproduction produces offspring that are genetically ____________ to the parent.
Identical
200
What is the punnet square used for?
to organize all of the possible combinations of offspring from parents.
200
Name two traits that could be inherited from a parent?
Examples: hair color, eye color, height, skin color, freckles, etc...
300
What are the threadlike structures of DNA that carry genes called?
Chromosomes
300
What type of organism did Gregor Mendel use to first study heredity?
Pea Plants
300
a copying process that produces cells with half the usual number of chromosomes
meiosis
300
A chicken with black feathers (BB) is crossed with another chicken with black feathers (BB). What percentage of offspring will be black?
100%
300
Why does a Punnet Square use capital and lowercase letters?
Capital = Dominant Trait Lower Case = Recessive Trait
400
A genetic situation in which one allele does not completely dominate another allele, and therefore results in a new phenotype.
incomplete dominance
400
The physical trait observed in an offspring is known as it's -
Phenotype
400
For some traits, only one copy of a particular gene is needed to show a given trait. These genes are referred to as-
Dominant
400
Having dimples is dominant (D). Not having dimples is recessive. (d) Both parents are heterozygous for the dominant trait. What percentage of the children will NOT have dimples?
25%
400
What is the mathematical chance something will happen?
probability
500
What do we call the entire genetic make up of an organism; also the combination of genes for one or more specific traits?
Genotype
500
When a plant pollinates a different plant this is called?
cross-pollination
500
chromosomes that have the same sequence of genes and the same structure
homologous chromosomes
500
Long ears are dominant (E) in rabbits. If one parent is homozygous dominant for the long ear trait and the other homozygous recessive (e), what is the only possible genotype of the offspring?
Ee
500
Two dark brown rabbits have four offspring. Three of the offspring are dark and one is white. What does this tell you about the parents' genes for fur color?
Dark brown is dominant and white fur is recessive. Both parents are heterozygous.
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