A characteristic of homologous chromosomes is that: A. they carry alleles for the same genes in the same relative positions. B. they regularly exchange parts by crossing over at meiosis. C. they physically pair at meiosis. D. they are found in pairs but they do not physically pair in interphase in a diploid cell. E. all of the above.

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.

yes it is weird but true

lesson summarykaryotypes a genome is the full set of all the genetic information that an organism carries in its dna. chromosomes arebundles of dna and protein found in the nucleus of a eukaryotic cell.