3.3 - Meiosis - Crossword Labs

3. cells have one chromosome of each pair (have one full set of the chromosomes that are found in its species).
6. a method of organizing the chromosomes of a cell in relation to number, size, and type.
7. cells the cellular lineage of a sexually reproducing organism from which eggs and sperm are derived.
8. over exchange of genetic material between non-sister chromatids during meiosis I.
12. a procedure used to diagnose genetic defects in the early stages of pregnancy; it involves collecting amniotic fluid using a needle and syringe.
13. villus sampling technique for diagnosing genetic defects while a foetus is in the uterus. A small sample of the placenta is removed and analysed.
14. a cell containing two sets of chromosomes (2n), one from each parent.
15. chromatids replicated forms of a chromosome joined together by the centromere and eventually separated during mitosis or meiosis.

1. one of the possible alternative of a gene, occupying a specific position on a chromosome, that controls the same trait.
2. one of two haploid reproductive cells, egg or sperm, whose union is necessary in sexual reproduction to produce a diploid zygote.
4. syndrome a human genetic disease resulting from having an extra chromosome 21 (characterized by having a delay in mental development).
5. an error during mitosis or meiosis in which both members of a pair of homologous chromosomes or both sister chromatids fail to move apart.
9. orientation the orientation of homologous chromosomes in the spindle axis during metaphase I is random and either maternal or paternal homologue may orient towards a given pole.
10. chromosomes chromosome pairs with genes for the same characteristics at corresponding loci.
11. the process of cell division in sexually reproducing organisms that reduces the number of chromosomes in reproductive cells from diploid to haploid.