Chapter 48 starts off with Joesph visiting his father Jacob with his two sons because he had been told his father was sick. It went from a visit to Jacob doing the traditional blessings on all his sons and passing away.
Jacob expresses his gratitude to God again for allowing him to see his son Joesph and being blessed to see Joesph's sons. He then puts Joesph's sons to the status of being Jacob's sons. Basically giving Joesph the double portion blessing that traditionally would have gone to the first born Reuben.
Jacob blesses Ephraim over Manasseh even though he is the youngest. I find that interesting because Jacob was the youngest, even though it was by deceit, received the firstborn blessing too. While thinking about that Matthew 20:16 came to mind, "So the last shall be first, and the first last; for many be called, but few chosen."
Jacob also gives a mountain slope that he had taken from the Amorites to Joesph instead of his brothers.
Chapter 49 Jacob blessed his sons according to how they had acted in the past and with a predictive element of their futures. I believe he was lead by God for these since only He knows what is to come.
Judah and Joesph get the longest blessings, which shows that Jacob believes that these two sons have important futures and so do their descendants. The Ephraimites do end up as one the leading tribes of Israel till they are rejected by God in favor for Judah. From Judah comes David and most importantly Jesus!
During Reuben's blessing Jacob explains why he lost the firstborn blessing. Reuben had slept with one of Jacob's servant wives.
Simeon and Levi's doesn't really sound like a blessing for them but more protection for others. Because of their anger and wrath they are to be divided and scattered as to not attempt to dominate the rest. This comes true for both tribes. The Levites end up with 48 cities distributed throughout all the tribes. The Simeonites get land within one taken by Judah.
Chapter 49 ends that right after the blessings Jacob tells them where he wants to be buried and then dies.
Chapter 50 isn't that long but there are three parts to it. The first being the burial of Jacob. They had him embalmed by Egyptian physicians in order to be able to make the journey to the burial site. It's believed they used physicians instead of the normal priests to show the it wasn't about the Egyptian religion.
To show just how high esteemed Joesph was in Egypt the funeral procession for his father was comprised of a large number of prominent Egyptian officials.
Now that Jacob was dead Joesph's brothers feared he hadn't really forgave them and was going to do something evil to them. They sent a messenger since they were too chicken to face him directly and lied saying their father said to forgive them. Joesph was kind to them and said while they were acting evil, God had it work for good.
Chapter 50 and the end of Genesis concludes with the death of Joesph. He made his family swear they would take his bones with them when they were called to the promised land by God. Moses does end up fulfilling that promise. Joesph is 110 years old when he dies and is embalmed. Him and his father are the only two that are mentioned in the Bible being embalmed.