For the phenotype of someone with a Widow's peak, give the genotypes that are possible. (Remember Widow's peak is dominant).

The dominant trait in duck beaks is long length, controlled by the B allele. Short beaks are determined by the recessive allele b. If the mother duck is homozygous for long beak length (BB) and the father is heterozygous (Bb), what percentage of their offspring will have long beaks? Draw a Punnett square to figure out the answer.

Dwarfism in humans is a dominant trait to normal growth. If a heterozygous man has a child with a woman that is homozygous dominant for dwarfism, what are the possible phenotypes of their offspring?

Curly hair is dominant over straight hair in poodles. Cross a

purebred dominant with a true breed recessive poodle. What percentage of their offspring could have curly hair?

What Is Probility?

In order to see a recessive trait in an organism’s phenotype, what must be the organism’s genotype? (using the letter H)

An organism with TWO different alleles for a particular trait is considered to be _________________.

Freckles are a recessive trait. Cross a heterozygous parent with NO freckles with a parent with freckles. What is the probability that the offspring will have freckles?

A plant with a dominant homozygous trait is crossed with a plant with a recessive homozygous version of that trait. What is the probability that the offspring will display the dominant trait in its phenotype?

Two Fire Dragons have a baby. They are really excited to have their first baby boy dragon. One of the first things that fire dragons do before they walk or fly is breathe out fire. Their baby dragon has already started flying but no fire! The dragon parents are sad their baby is not breathing fire so they go to the village medicine man to ask what is wrong with their baby. The medicine man explains that some dragons are born with a rare recessive trait that results in not breathing fire. Since it is a recessive trait that means that the baby dragon is homozygous recessive (ff) for fire breathing. Both of his parents can breathe fire. What are the genotypes for the dragon parents?

No two people have the same DNA, except for

The different forms of a gene are called

An organism's physical appearance is its

What cell process produces only body cells?