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?

1/3

1/4

1/8

0

2/3

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