Hemophilia has an x-linked recessive pattern. it is carried on the 'x' chromosome. it is only expressed phenotypically as homozygous recessive in women but men that inherit the affected chromosome will suffer from the disorder. a carrier female (one with an affected x chromosome) married a man with hemophilia, and they have children. what percent of their male children will be affected by hemophilia?

25 %

Explanation:

25 percent (25 %) of their male children will be affected by hemophilia because when you cross link, the mother has only one of her X chromosome affected.

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."

answer: although many types of viruses can cause a common cold, rhinoviruses are the most common culprit. a cold virus enters your body through your mouth, eyes or nose. the virus can spread through droplets in the air when someone who is sick coughs, sneezes or talks. theres your answer

explanation: