g quiz 9

What types of gametes will be produced from a diploid plant if nondisjunction occurs during one of the second meiotic divisions?

Two haploid gametes, one gamete with an extra copy of the affected chromosome, and one gamete missing a copy of the affected chromosome

Nondisjunction in the first meiotic division in a human male could result at fertilization in _____.

Turner syndrome or Klinefelter syndrome

When you cross a diploid plant that has 24 chromosomes with a tetraploid close relative that has 48 chromosomes, how many chromosomes does the F1 hybrid have? Is it fertile?

36, No

Banana is a triploid plant that is sterile (cannot produce seeds). How do you make it fertile?

Double its total number of chromosomes

Which human disease is caused by an abnormal autosome?

Down syndrome

Down syndrome is observed at a higher frequency with older women because more mutations occur during early embryo development of her children. True or False?

False

A plant is a hexaploid (72 chromosomes). What is the diploid number of the probable ancestor?

24

If you treat a triploid cell going through mitosis with colchicine, what would be the ploidy level in its daughter cells?

Hexaploid

If you treat an autotetraploid cell during meiosis I with colchicine (removed after meiosis I), what would be the ploidy level in the gametes?

All have 4n