What does a punnet square show? 1. All possible outcomes of genetic cross
2. Only the dominant alleles in a genetic cross
3. Only the recessive alleles in a genetic cross
4. All of Mendels discoveries about genetic crosses

1.)

Explanation:

A Punnett square predicts all the possible ways the alleles can combine. It can be used to predict ratios of offspring genotypes and phenotypes. Although, Punnett squares cannot determine actual outcomes.

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each of the 46 original chromosomes splits into two daughter chromosomes, so there are two sets of 46 daughter chromosomes that end up in each cell. human cells have 46 chromosomes. each chromosome consists of a pair of identical chromatids attached together by a structure called a centromere.