Considering an x-linked dominant trait, if an unaffected woman and an affected man decide to have children, which of the following statements is true about the possibilities for their children?
a. their sons are expected to be heterozygous for the associated gene.
b. their daughters are expected to be heterozygous for the associated gene.
c. all their children, whether male or female, are expected to show the dominant trait.
d. all of their sons are expected to show the dominant trait.
e. their daughters are not expected to show the dominant trait.

The construction of phylogenetic trees is a mapping out the proposed divisions and common ancestors of all living species. traditionally, these trees have been built using morphological data, such as appearance and embryology. recently, it has been possible to construct these trees using molecular data. phylogenetic trees based on different types of information agree with each: that there is strong evidence of a real underlying common descent. this phylogenic tree is composed based on molecular data (rrna). what statements can we infer are true about the organisms throughout the tree? because the tree is rooted, all branches share a common ancestor. all organisms have some sort of cellular structure/organization. all eukaryotes evolved from bacteria. since the organisms contain rna, they share the same dna. if the organisms contain rna, the share the same four nitrogen bases.

Imagine that a mouse has white fur because of a mutation in its dna. which of the following conclusions can be drawn

Which best describes a rhinovirus? o a. a virus that causes a common cold o b. a protective shell around a virus o c. a tube the comes off a virus o d. a piece of dna transferred by a virus