Answer: the answer is that it used to be a wetter place
Explanation:
But an egg or sperm only has one. That one is chosen at random, through a process called meiosis. When meiosis messes up, you can end up with to many or too few chromosomes. One extra chromosome in a egg or sperm means three in the fertilized egg and so trisomy.
Answer:
1/8.
Explanation:
Karyotype may be defined as the visual appearance and the number of chromosome of the organism. Karyotype helps in studying the chromosomal abnormalites.
The human male has extra piece at chromosome 4. The abnormal pattern on the chromosome 7. The probability to inherit the defective chromosome 4 is 1/2, defective chromosome 7 is 1/2 and the probability of Y chromosome is 1/2. The probability of child to inherit all these chromosome is (1/2) × (1/2) × (1/2) = 1/8.
Thus, the answer is 1/8.
Nearly all of the energy used by living things on earth to survive originally came from the sun .Producers plant produce their own food from sun,water,air (Carson dioxide) and soil.
