Non-Mendelian Genetics Review 25-26

Multiple Choice

In flowers, 2 pink (RW) flowers are crossed. What are the genotypes and phenotypes of their offspring?

• 100% pink (RW)

• 50% pink (RW); 25% white (WW); 25% red (RR)

• 75% pink (RW); 25% white (WW)
• 100% red (RR)

Multiple Choice

Using a Punnett square, predict the outcome of a cross between a homozygous red-flowered plant (RR) and a homozygous white-flowered plant (WW) in incomplete dominance.

• 100% pink flowers

• 50% red, 50% white flowers

• 100% red flowers

• 100% white flowers

Multiple Choice

If Tom has the genotype I^AI^B (AB) and Angela has the genotype I^Bi (BO), what are the possible phenotypes of their children?

• Group A, Group B, Group AB only

• Group A, Group B, Group AB, and Group O

• Group A and Group AB only

• Group A and Group B only

Fill in the Blanks

Multiple Choice

What is the term used to describe the inheritance pattern shown in the Roan cow, which exhibits both red and white colors?

• Co-dominance

• Incomplete dominance

• Complete dominance

• Recessive trait

Open Ended

Which of the following karyotypes are of an individual who is biologically female? How do you know?

Multiple Choice

The picture shows 46 chromosomes taken from a human:

• Male, because there are two X chromosomes

• Male because there is an X and a Y

• Female because there are two X chromosomes

• Female because there is an X and a Y

Multiple Choice

Colorblindness is more common in males than in females because......

• fathers pass the allele for colorblindness to their sons only

• the allele for colorblindness is located on the Y chromosome

• the allele for colorblindness is recessive and located on the X chromosome

• males who are colorblind have two copies of the allele for colorblindness

Multiple Choice

Duchenne muscular dystrophy is a recessive x-linked disorder.
According to the Punnett square, what percentage of male offspring will have the disorder?

• 0%
• 25%
• 50%
• 100%

Multiple Choice

Which of the following genotypes belongs in the red box in the Punnett square?

• X^BX^b
• X^bX^b
• X^bY
• X^BY

Hotspot

Hemophilia also known as bleeder's disease is an X-linked trait. A mother who is heterozygous for hemophilia married a man without hemophilia. Examine the cross and identify the offspring with normal phenotype. Select all that apply.

Multiple Choice

The range of human skin colors is caused by a variety of genes, each of which has at least 2 alleles.  This is an example of:

• incomplete dominance
• codominance
• multiple alleles
• polygenic inheritance

Multiple Choice

How can environmental factors affect gene expression?

• a) By modifying DNA sequences

• b) By altering how a gene is expressed.

• c) By directly changing gene function

• d) None of the above

Multiple Choice

What type of soil is associated with the pink hydrangea shown in the image?

• Acidic soil

• Basic soil

• Neutral soil

• Sandy soil

Multiple Choice

What is the relationship between pleiotropy and genetic diseases?

• Pleiotropy causes all genetic diseases

• Many genetic diseases are the result of pleiotropic effects, where a single gene mutation can cause multiple symptoms

• Pleiotropy and genetic diseases are unrelated

• Genetic diseases only occur when pleiotropy is not present

Multiple Choice

What is the relationship between a widow's peak and baldness in terms of genetic coding?

• Widow's peak is dominant over baldness

• Baldness is dominant over widow's peak

• Both traits are independent

• Widow's peak and baldness are codominant