The first two times the words "these are the generations" are used is very important because we are looking at two different sets of generations. First Corinthinians 15:45-49 says, "And so it is written, the first man adam was made a living soul; the last Adam was made a quickening spirit. Howbeit that was not first which is spiritual, but that which is natural; and afterward that which is spiritual. The first man is of the earth, earthy; the second man is the Lord from heaven. As is the earthy, such are they also that are earthy; and as is the heavenly, such are they also that are heavenly. And as we have borne the image of the earthy, we shall also bear the image of the heavenly.
Genesis 2:4 says, "These are the generations when the Lord (Jehovah) God (God of this world, 2 Cor. 4:4) formed things. In verse 7, the Lord God formed man (aw-dawm) (I Timothy 2:13). The word "man" (hebrew 120) is used exclusively in chapters 2-4 of Genesis, even when the word is translated Adam. Two times the word (hebrew 121 Adam) was mistakenly inserted into Genesis 2:21, 3:17. These are the generations when the Lord God formed things. In verse 7, he forms man (aw-dawm) out of the dust of the ground. Remember, this is the first man of the earth - earthy, NOT from heaven - heavenly. The first set of generations are that of the earth, earthy. We know that this was the man who was made a living soul. This man is not perfected and there is no mention of the seven days.
Next, let's go to the second set of generations in Genesis 5:1. "The generations of Adam (the son of God, Luke 3:38), when God (Elohiym) created them both male and female. The same God who prophesied concerning the creation of such a man, in the image and likeness of God (Genesis 1:26). In chapter 5, the word Adam is exclusively used and only once is aw-dawm (120) inserted (verse 2) in reference to Adam. It is really important that we know the difference between the generations of the first man aw-dawm and the generations of the second man Adam.
Let's go backward through the lineage of the second man, from the Lord from heaven to Adam, "The son of God." Read Luke 3:23. It starts with Jesus and ends with Adam in verse 38. Find Adam and look. Who is this but the son of God? Now, just take a glance at the first few of the forefathers of Jesus. Notice Adam, Seth, Enos, Cainan, etc. Read Genesis chapter 5, verse 3. Notice Adam, Seth, Enos, Cainan, etc. Go to verse 1 and see who created Adam. God (Elohiym) in the likeness of himself, male and female, created Adam.
Most of the information we take in, comes in the form of words. Obviously, we don't want to act on everything we hear. So, we rely on a process called discrimination to sort, classify, dump or file. It's the ideas we file away as truth that program our sub-conscience mind and in turn we become. Words can make you become a child of the devil or a son of the most high depending on what idea you choose to file away. Just as most of us were taught that as a species we were descendants of an ape-man, we were also taught that we were lost sinners because of the "fall of Adam;" and that by the grace of God, if we are good enough, we will make it to heaven some day. That is not the mind of Christ. The mind of Christ says that you are sons of God and are made in the image of the Most High. Which genealogy are you from?
Mitochondria DNA tests proved a distinction between Homo Erectus (ape-man, australopithecines, 1.7 to 1.9 million years ago), once thought to be our human ancestor (now extinct), and Homo Sapiens (1997). Humans have now been classified as Homo Sapiens (early, Neanderthalensis, 200,000 to 300,000 years ago) and Homo Sapiens, Sapiens (modern, Cro-magnon, 90,000 to 120,000 years ago) as two generations of man having appeared. The Bible does not dispute this, the man aw-dawm formed of the dust by the Lord God (Jehovah) and Adam created by Elohiym. The fossil records of both co-existing, have been unearthed in the caves just outside Nazareth. The daughters of aw-dawm intermingling with the sons of God producing mortality.