Exam 10: Patterns of Inheritance

If you cross pea plants that are heterozygous for purple flowers and yellow seeds (PpYy), and you examine 800 offspring for flower and seed color, about how many do you expect to have white flowers and green seeds?

For which disorder can those affected be male or female?

Color blindness is more common in men than in women because:

Which of the following conditions causes may cause infertility in a human?

The wavy hair in children of straight-haired and curly-haired parents is the result of ________.

Hemophilia is a genetic disease that has plagued the royal houses of Europe since the time of Queen Victoria, who was a carrier. Her granddaughter, Alexandria, married Nicholas II, the last czar of imperial Russia. Alexandria was a carrier for hemophilia, but Nicholas was normal. Their son, Alexis, was afflicted with the disease. Alexis and his four sisters were all killed in 1917. Based on this scenario, it is most likely that:

What type of allele produces its effects in only homozygous individuals?

A human sperm cell possesses autosomes and:

A sex-linked recessive condition that causes abnormal color vision is called:

A color-blind boy has a mother with normal vision and a color-blind father. From which parent did he get the color-blind gene?

The physical manifestation of an organism's genes is its:

Hemophilia is a sex-linked recessive gene that causes a blood disorder. What are the chances that the daughter of a normal man and a heterozygous woman will have hemophilia?

An individual who is a carrier for a sex-linked trait, such as hemophilia:

All of the following combinations are possible in the gametes of an organism that is AaBb EXCEPT:

Autosomal nondisjunction can result in:

A disorder caused by nondisjunction of chromosome 21, resulting in a trisomy 21 child, is:

Which disorder is the most common chromosome anomaly among newborns?

If two parents are carriers of albinism (an autosomal recessive trait), what is the chance that their fourth child will have a homozygous genotype?

The failure of chromosomes to segregate properly during meiosis is called:

Yellow-seeded pea plants may be homozygous or heterozygous. To find out which, we can cross the plants with: