Answer:
The <em>tetrad</em> occurs during the first phase of meiosis. It is the foursome of <em>chromatids</em> that forms when replicated homologous chromosomes align. It must be formed for crossing over to occur. It is broken apart when the homologous chromosomes separate in meiosis I.
Answer is D - lysosomes.
Peroxisomes are found in animal cells though the enzymes they contain perform redox rather than hydrolytic reactions.
The remaining options are found in plant cells but not animal cells.
The surviving children would be 66.7% female and 33.3% male. Of the female children, 50% would be expected to be carriers of this gene (like their mother)
| Xg | X
—————-
X | XXg | XX
—————-
Y | XgY | XY
Pretty ugly, but the best punnet square I can do without a link. The offspring with the “g” are those that carry the lethal gene. The male child that carries it will die, but since it is recessive, the female child will live but will be a carrier for this gene. I hope this helps.
Haploid means a single set of unpaired chromosomes. Diploid means two complete sets of chromosomes (one from each parent).
Haploid is N and diploid is 2N.
