Biology, 25.11.2019 22:31, mahmudabiazp3ekot
Down syndrome is caused by trisomy 21, the presence of three copies of chromosome 21. the extra copy usually results from nondisjunction during meiosis. in some cases, however, the extra copy results from a translocation of most of chromosome 21 onto chromosome 14. a person who has had such a translocation in his or her gamete-producing cells is a carrier of familial down syndrome. the carrier is normal because he or she still has two copies of all the essential genes on chromosome 21, despite the translocation. however, the same may not be true for the carrier’s offspring.
Answers: 2
Biology, 22.06.2019 01:20, josephrosanne18
Transmission electron microscope are best for viewing a) microorganisms in pond water b) internal organs of a mouse c)internal structures of a cell d) surface features of a specimen
Answers: 2
Biology, 22.06.2019 14:00, stephaniedoffing
The law of thermodynamics states that energy can't be created or destroyed. to natural sources of energy on earth are the
Answers: 3
Biology, 22.06.2019 15:20, ashley232323
Suppose a particular species of tulip plant has three alleles for the gene that codes for flower color. the cr allele produces red tulips, the cp allele produces purple tulips, and the cw allele produces white tulips. cr is dominant over cp and cw, and cp is dominant over cw. for each of the following crosses, determine the expected ratio of offspring for each flower color. cr cp x cp cw cr cw x cp cw 1 red: 1 purple : 0 white, 1 red: 2 purple: 1 white, 2 red: 1 purple 1 white, 1 red: 3 purple : 0 white, 2 red: 0 purple : 2 white, 2 red: 2 purple : 0 white
Answers: 2
Down syndrome is caused by trisomy 21, the presence of three copies of chromosome 21. the extra copy...
Mathematics, 18.04.2020 04:55
Social Studies, 18.04.2020 04:55
Mathematics, 18.04.2020 04:55
Mathematics, 18.04.2020 04:55