Question 1

After meiosis, each new cell nucleus contains _____ chromosomes.

Accepted Answer

Meiosis results in the production of gametes or sex cells, which have half the number of chromosomes as the parent cell. In humans, the parent cell (diploid) has 46 chromosomes, and the gametes (haploid) have 23 chromosomes. Therefore, after meiosis, each new cell nucleus contains 23 chromosomes.

Question 2

Discuss the cause and symptom of Huntington's disease (HD).

Accepted Answer

The answer of Discuss the cause and symptom of Huntington's...

Question 3

Chromosomes are _____ structures found in cells.

Accepted Answer

Chromosomes are rod-shaped structures found in cells.

Question 4

According to a study in 2014 by Skakkebaek et al., who among the following is most likely to have gynecomastia?

Accepted Answer

According to the study, individuals with Klinefelter syndrome are most likely to have gynecomastia, as they have an extra X chromosome that can disrupt hormone balances and lead to breast development. Down's syndrome, XYY syndrome, and Turner syndrome are not typically associated with an increased risk of gynecomastia.

Question 5

_____ is a procedure that uses ultrasonic sound waves to create a picture of an embryo or fetus.

Accepted Answer

A sonogram is an imaging technique that uses ultrasonic sound waves to create a visual representation of an embryo or fetus.

Question 6

How would one identify a person with Down's syndrome?

Accepted Answer

The answer of How would one identify a person with...

Question 7

What were the conclusions of kinship studies?

Accepted Answer

The answer of What were the conclusions of kinship studies?...

Question 8

Each member of a pair of genes is termed a(n) _____.

Accepted Answer

Each member of a pair of genes is called an allele.

Question 9

Which of the following is considered a multifactorial problem?

Accepted Answer

Diabetes mellitus is a multifactorial problem, which means it is caused by a combination of environmental and genetic factors. Cystic fibrosis, Down's syndrome, and XYY syndrome are all genetic disorders caused by a specific change in the DNA.

Question 10

Twins that derive from a single zygote that has split into two are called:

Accepted Answer

Monozygotic (MZ) twins are also known as identical twins and are derived from a single fertilized egg that splits into two separate embryos.

Question 11

The typical sex chromosome pattern for males is _____.

Accepted Answer

The typical sex chromosome pattern for males is XY.

Question 12

According to a study by Fellman (2013), which of the following is true of fertility drugs?

Accepted Answer

Fertility drugs are known to increase the likelihood of multiple births because they stimulate the ovaries to release more than one egg during ovulation.

Question 13

If adopted children show more of a similarity in characteristics to their natural parents than to their adoptive parents, it can be concluded that:

Accepted Answer

The fact that adopted children show more similarity to their biological parents suggests that genetics play a role in the development of certain characteristics. While environment also plays a role in development, this finding indicates that genetics cannot be discounted as a factor.

Question 14

Daisy has always been unusually short for her age from the time she was a child. She was unable to conceive after marriage and upon visiting a doctor, she was prescribed estrogen replacement therapy. Daisy is most likely suffering from:

Accepted Answer

Turner syndrome is a condition that affects females, where one of the X chromosomes is missing or partially missing. It often results in short stature and infertility, which aligns with Daisy's symptoms. Estrogen replacement therapy is commonly prescribed to help with the development of secondary sexual characteristics and other symptoms associated with Turner syndrome.

Question 15

Why is amniocentesis carried out on pregnant women?

Accepted Answer

The answer of Why is amniocentesis carried out on pregnant...

Question 16

Distinguish between Klinefelter syndrome and Turner syndrome.

Accepted Answer

The answer of Distinguish between Klinefelter syndrome and Turner syndrome....

Question 17

A human zygote contains _____ pairs of autosomes.

Accepted Answer

The answer of A human zygote contains _____ pairs of...

Question 18

According to a study by van Gameren-Oosterom (2013), individuals with Down's syndrome:

Accepted Answer

Individuals with Down's syndrome typically show deficits in cognitive development due to the presence of an extra chromosome 21, which affects brain development and function.

Question 19

Which of the following is true of mutations?

Accepted Answer

The answer of Which of the following is true of...

Question 20

__________is a fatal genetic neurologic disorder whose onset is in middle age.

Accepted Answer

Huntington's disease is a fatal genetic neurologic disorder that usually starts in midlife, causing progressive deterioration of cognitive, motor, and emotional function. It is caused by an autosomal dominant mutation in the HTT gene on chromosome 4. Symptoms usually start appearing between the ages of 35 and 50 and include involuntary jerking or writhing movements (chorea), difficulty with coordination, depression and irritability, and progressive cognitive decline. There is currently no cure for Huntington's disease.

Quiz 2: Heredity