Asexual and sexual reproduction
Answers are for parents and teachers.
1
Make a table comparing asexual and sexual reproduction in five respects.
Number of parents: 1 / 2; cells: somatic (mitosis) / gametes (meiosis); offspring genotype: copy of parent / new combination; speed: fast / slower; variety: low / high.
2
Write the method of vegetative reproduction for strawberry, potato and rose.
Strawberry – runners; potato – tuber; rose – cuttings.
3
Write which parts form the seed and the fruit in a flowering plant.
The seed forms from the ovule (the embryo from the zygote, the endosperm from the central cell); the fruit from the ovary (and sometimes other flower parts).
4
If 20 cells in an ovary and 20 cells in a testis undergo meiosis in the maturation zone, how many mature sex cells (egg cells and spermatozoa) form in total? (Number only.)
100
5
Why are identical twins so similar to each other?
They develop from parts of one embryo that came from a single zygote (polyembryony), so their genotypes are the same.