Question

amoeba sisters chromosomes and karyotypes

1. chromosomes typically drawn in a x shape
2. chromosomes in bacteria tend to have a circular shape.
3. chromosomes are made of dna and protein
4. dna has to fit inside a nucleus.
5. during dna replication dna typically needs to be __
6. the newly made chromosome is still bound here in this region called the __
7. when joined we still count this as chromosome unit that has sister chromatids.
8. in humans, you have 46 chromosomes
9. after they replicate you still have 46 chromosomes here but there are 92 chromatids
10. the chromatids get pulled apart so that each cell will have chromosomes.
11. you can see all 46 chromosomes in a __
12. in a karyotype the chromosomes are arranged in __ pairs
13. in a homologous pair, you receive chromosome from one parent and chromosome from the other parent
14. 44 of the chromosomes are called __
15. the last two chromosomes are called __ chromosomes
16. __ have half the number of chromosomes as body cells
17. sperms cells are considered __ because they only have 1 set of chromosomes
18. when a sperm and egg cell combine, they form a fertilized egg, known as a __
19. a cell with 2 sets of chromosomes is considered __
20. a karyotype can reveal chromosomes or chromosomes at specific locations

Explanation:

These questions are about chromosomes, DNA, karyotypes, and cell types (like gametes), which are core topics in Biology (a subfield of Natural Science). The questions cover structure (e.g., chromosome shape, composition), replication, human chromosome number, karyotype organization, homologous pairs, autosomes/sex chromosomes, gametes (sperm/egg), fertilization, and karyotype analysis. Biology focuses on living organisms' structure, function, growth, etc., so this fits.

Answer:

1. X (chromosomes are often depicted in an X - shape during certain stages)
2. Circular (bacterial chromosomes are circular)
3. DNA and protein (chromosomes are composed of DNA wrapped around proteins like histones)
4. Nucleus (DNA is contained within the nucleus of eukaryotic cells)
5. Replicated (during DNA replication, the DNA molecule is copied)
6. Centromere (the region where sister chromatids are joined is the centromere)
7. One; two (when sister chromatids are joined, it's one chromosome unit with two sister chromatids)
8. 46 (humans have 46 chromosomes in somatic cells)
9. 46; 92 (after replication, the number of chromosomes (counted by centromeres) remains 46, but chromatids are 92)
10. Sister; 46 (sister chromatids are pulled apart, and each cell gets 46 chromosomes)
11. Karyotype (a karyotype shows all the chromosomes of an individual)
12. Homologous (in a karyotype, chromosomes are arranged in homologous pairs)
13. One; one (in a homologous pair, one chromosome comes from each parent)
14. Autosomes (44 of human chromosomes are autosomes, not sex - determining)
15. Sex (the last two chromosomes are sex chromosomes, XX or XY)
16. Gametes (gametes (sperm and egg) have half the number of chromosomes of somatic cells)
17. Haploid (sperm cells are haploid as they have one set of chromosomes)
18. Zygote (a sperm and egg combine to form a zygote)
19. Diploid (a cell with two sets of chromosomes is diploid)
20. Extra; missing (a karyotype can reveal extra or missing chromosomes, indicating disorders like trisomy)