Which of the following might result in a human zygote with 45 chromosomes?
a) an error in either egg or sperm meiotic anaphase
b) failure of the egg nucleus to be fertilized by the sperm
c) fertilization of a 23 chromosome human egg by a 22 chromosome sperm of a closely related species
d) an error in the alignment of chromosomes on the metaphase plate
e) lack of chiasmata in prophase i

2points what is the term for a female reproductive cell? a. egg b. chromatid c. allele d. fertilization

Amarine ecologist has constructed the conceptual model shown in the diagram. what predictions can be made from using this model? where the tertiary consumers get their energy how often primary producers are able to reproduce when bacteria and fungi initiate the process of decomposition whether other secondary consumers are present

Graded assignment lab report answer the questions below. which combinations of substances resulted in a chemical change? for each metal that participated in a chemical change, write the type of metal it is, based on your examination of the periodic table. were there any metallic compounds that did not react with either the acid or the base? write the type of metal, based on your examination of the periodic table. make a general statement about the reactivity of the metals in this experiment.