Unit 6 Heredity Practice Test 2

Which genotype below is heterozygous?

An organism’s expressed physical trait, such as seed color, is called its:

If the allele for green pea pod color (G) is dominant over the allele for yellow pea pod color (g), which of the following genotypes would a plant with yellow pods have?

In corn plants, green (G) is dominant to yellow (g). What is the chance of two heterozygous corn plants producing yellow corn plants?

What information is revealed in the portion of the karyotype above?

Which of the following describes an organism that has the genotype Bb?

Genes located on homologous chromosomes may have alternate forms that control different forms of a trait. These alternate forms of a gene are called _____.

What is the genotype in the bottom left-hand quadrant in the Punnett square shown above?

A trait carried on the X or Y chromosome is said to be ________ inheritance.

The alleles contained in _____ produced by each parent are shown along the sides of a Punnett square.

A useful device for predicting the possible offspring of crosses between different genotypes is the _____.

A couple has two children, both of whom are boys. What is the chance that the parents' next child will be a boy?

How should the TOP ROW of the figure above read?

What fraction of the cross shown above will be recessive for both traits?

The type of inheritance shown when a red-flowering plant is crossed with a white-flowering plant and only pink-flowering plants are produced is _____.

The 23rd pair of chromosomes that differ in males and females are called _____.

If individual III-2 marries a person with the same genotype as individual I-1, what is the chance that one of their children will be afflicted with hemophilia?

What type of inheritance pattern does the trait represented by the shaded symbols in the figure above illustrate?

For the trait being followed in the pedigree, individuals II-1 and II-4 in the figure above can be classified as _____.

What is the relationship between individual I-1 and individual III-2 in the figure above?

Color blindness is typically a recessive trait, and it is usually linked to the X chromosome. Since males have one X and one Y chromosome (XY), if they inherit the recessive allele for color blindness on their X chromosome, they will express the trait. Females have two X chromosomes (XX), so they would need to inherit the recessive allele on both X chromosomes to be color blind. If they have one normal allele, they will be a carrier but not express color blindness.

An individual of phenotype X^BX^B marries an individual whose phenotype is X^bY. What proportion of their male children will be colorblind?

When red and yellow spotted beetles are mated, 25% of the offspring are red, 50% are red and yellow spotted, and 25% are yellow. This trait is one controlled by _____.

Because the gene for red-green colour-blindness is located on the X chromosome, it is not possible for a:

A dominant phenotype must have at least _____ dominant allele(s) present in the parent(s).

A man heterozygous for blood type A marries a woman heterozygous for blood type B. The chance that their child will have type O blood is _____.