According to the Punnett square in basic mendelian genetics: B reprepsents the dominant gene for blue feathers and b represents the recessive gene for red feathers. Two heterozygous birds have one offspring. What percent chance does it have for red feathers?

In humans, a male has

Which of the following combinations of sex chromosomes represents a female?

Situations in which one allele for a gene is not completely dominant over another allele for that gene are called

Gregor Mendel’s principles of genetics apply to

A male and female bison that are both heterozygous for normal skin pigmentation (Aa) produce an albino offspring (aa). Which of Mendel’s principles explain(s) why the offspring is albino?

Snapdragons, a flowering plant popular with gardeners, can have red, white, and pink colored petals. When snapdragons with red petals (RR) are crossed with snapdragons having white (WW) petals, the offspring have pink petals. The pink coloration (RW) is a phenotype in between the red and white parental phenotypes. What is this kind of inheritance pattern called?

Two heterozygous purple-flowering pea plants are crossed. If purple is dominant over white, what are the expected phenotypic results?

The Brahman cattle have good resistance to high temperature, but its meat is poor and tough to eat. The English shorthorn cattle, on the other hand, have good meat, but poor resistance to high temperatures. Scientists formed the Santa Gertrudis cattle by breeding Brahmans with English shorthorns. This new type of cattle has good meat and resistance to high temperatures. This is an example of

Organisms that have two identical alleles for a particular trait are said to be

If a man is heterozygous (Aa) for a trait, predict his possible sperm.

50% would carry a dominant (A) and 50% would carry a recessive (a)

Which of Mendell’s law’s best describes this concept?

A scientist has discovered a new gene in oysters. Oysters with the dominant allele for disease resistance 'R' have been found to tolerate polluted waters better than oysters with the recessive 'r' allele. What term is used to describe an oyster that has two identical dominant alleles (RR) for this gene?

A cross between a Type A blood (IAi) with a Type B (IBi) blood person results in a child having Type AB blood. This type of inheritance is known as

All BUT ONE statement describes an advantage of meiosis.

All of the following are effects of crossing over of homologous chromosomes during prophase I of meiosis with the EXCEPTION of

When gametes combine to form a zygote, the chromosomes number of the zygote is now referred to as

If an organism’s diploid number is 12, its haploid number is

Unlike mitosis, meiosis results in the formation of

In normal humans, sex cells contain the _________ number of chromosomes.