Please just explain correct. Thanks!Which of the following human cells contains a gene that specifies eye color?
Cells in the eye and gametes
Gametes (sperm and egg)
Cells in the heart
All cell types
Cells in the eye
During the first meiotic division in cells __
the cell become haploid
sister chromatids form
homologous chromosome pairs separate
sister chromatids separate
homologous chromosomes separate and the cell becomes haploid.
Hillary is 8 years old and has neuronal ceroid lipofuscinosis, also known as Batten disease. It is autosomal recessive. She has fine until age five, when she began to lose her vision and stumble. She had learning difficulties in school and was diagnosed at age six. Hillary may only live into her twenties, experiencing dementia and seizures. Her younger brother Jaden, age six, is healthy, as are her parents. What is the probability that Jaden is heterozygous for this condition?