Author Question: An expectant father asks the nurse, Which part of the mature sperm contains the male chromosomes? ... (Read 73 times)

tsand2

  • Hero Member
  • *****
  • Posts: 520
An expectant father asks the nurse, Which part of the mature sperm contains the male chromosomes? What is the best response by the nurse?
 
  a. X-bearing sperm
  b. The tail of the sperm
  c. The head of the sperm
  d. The middle portion of the sperm

Question 2

Two healthy parents who carry the same abnormal autosomal recessive gene have what percentage chance of having a child affected with the disorder caused by this gene? Record your answer as a whole number. _____
 
  Fill in the blank with correct word.



catron30

  • Sr. Member
  • ****
  • Posts: 297
Answer to Question 1

ANS: C
The head of the sperm contains the male chromosomes that will join the chromosomes of the ovum. If an X-bearing sperm fertilizes the ovum, the baby will be female. The tail of the sperm helps propel the sperm toward the ovum. The middle portion of the sperm supplies energy for the tail's whiplike action.

Answer to Question 2

ANS:
25
Two healthy parents who carry the same abnormal autosomal recessive gene have a 25
chance of having a child affected with the disorder caused by this gene. Unaffected
parents are carriers of the abnormal autosomal recessive trait. Children of carriers have a
25 (1 in 4) chance of receiving both copies of the defective gene and thus having the
disorder.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

Bisphosphonates were first developed in the nineteenth century. They were first investigated for use in disorders of bone metabolism in the 1960s. They are now used clinically for the treatment of osteoporosis, Paget's disease, bone metastasis, multiple myeloma, and other conditions that feature bone fragility.

Did you know?

Liver spots have nothing whatsoever to do with the liver. They are a type of freckles commonly seen in older adults who have been out in the sun without sufficient sunscreen.

Did you know?

This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.

Did you know?

Most women experience menopause in their 50s. However, in 1994, an Italian woman gave birth to a baby boy when she was 61 years old.

Did you know?

Patients who have undergone chemotherapy for the treatment of cancer often complain of a lack of mental focus; memory loss; and a general diminution in abilities such as multitasking, attention span, and general mental agility.

For a complete list of videos, visit our video library