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Mendelian Genetics
Punnett Squares
Vocabulary
What do you know?
Rules of genetics
100
the father of genetics
Who is Gregor Mendel
100
a model we use to predict the traits of offspring
What is a punnet square
100

the trait that is stronger or overshadows and is expressed

What is dominant

100

characteristics passed on from one generation to the next controlled by genes

What are traits?

100

An alternative form of a gene is called a _________.

What is an allele?

200

the scientific study of heredity is called...

What is genetics?

200

Cross a homozygous dominant (AA) and a heterozygous (Aa) individual for allele A.

Top left box= AA, Top right box= AA, Bottom left box= Aa, Bottom right box= Aa

200

the trait that is weaker or hides in the background and can only be expressed in homozygous form

What is recessive.

200
the different combination of alleles for an organism
What is genotype?
200

A "pure" breed genotypic description of an allele is called a _________________.

What is homozygous dominant?

300
the part of the chromosome that controls our traits are called...
What are genes?
300

percentage of homozygous recessive offspring that result from a cross between 2 heterozygous parents.

What is 25%?

300
the physical appearance of a trait
What is phenotype
300
Another way to describe an organism that is homozygous
What is purebred?
300

If the dominant allele for height in plants is represented by (T), what would be the genotype of a short plant?

What is homozygous recessive?

400

state the phenotype of Bb (if B=brown and b=blue)

What is brown?

400

percentage of offspring that will be heterozygous from a cross of 2 heterozygous individuals for allele A

What is 50%

400

when an organism has two alleles that are the SAME, HH or hh, for one trait

What is homozygous

400
Another way to describe an organism that is heterozygous
What is hybrid?
400

In humans Cystic Fibrosis is a congential inherited mutation of a gene that impacts the process of protein production. It is associated with a recessive allele (c'). If an individual is a "carrier" for the condition, what would be their genotype?

What is Cc'? Heterozygous for the allele (C)

500

Gregor Mendel got these size pea plants when he crossed a tall pea plant with a short pea plant

What is all tall pea plants?

500

B=not bald b=bald, percentage of offspring that will NOT be bald from a cross between 2 heterozygous parents

What is 75%

500

when an organism has two alleles that are DIFFERENT, Hh, for one trait

What is heterozygous

500

the letters that represent the different forms of a particular gene

What are alleles?

500

If two individuals that are heterozygous for the trait of eye color (dark colored eyes are dominant to dark colored eyes) mate, what are the odds that the offspring with have light colored eyes?

What is 75%? Three out of four