What is meant by the term autosome?
Reveal answer
Chromosome other than a sex chromosome.
Key words: autosome
4(b) INHERITANCE · RECALL
4.26 Sex chromosomes
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What is meant by the term sex chromosome?
Reveal answer
Chromosome participating in genetic pathways of sexual development.
Key words: sex chromosome
What is meant by the term karyotype?
Reveal answer
Number and visual appearance of chromosomes in a cell.
Key words: karyotype
What is meant by the term SRY?
Reveal answer
Y-chromosome region commonly initiating testis-development pathways.
Key words: SRY
Human chromosome sets: for Typical XX body cell, give the autosomes and the sex chromosome(s).
Reveal answer
Autosomes: 44 (22 pairs). Sex chromosome(s): XX.
Key words: Typical XX body cell
Human chromosome sets: for Typical XY body cell, give the autosomes and the sex chromosome(s).
Reveal answer
Autosomes: 44 (22 pairs). Sex chromosome(s): XY.
Key words: Typical XY body cell
Human chromosome sets: for Egg, give the autosomes and the sex chromosome(s).
Reveal answer
Autosomes: 22. Sex chromosome(s): X.
Key words: Egg
Human chromosome sets: for X-bearing sperm, give the autosomes and the sex chromosome(s).
Reveal answer
Autosomes: 22. Sex chromosome(s): X.
Key words: X-bearing sperm
Human chromosome sets: for Y-bearing sperm, give the autosomes and the sex chromosome(s).
Reveal answer
Autosomes: 22. Sex chromosome(s): Y.
Key words: Y-bearing sperm
True or false, and why? “The Y chromosome contains only one gene.”
Reveal answer
False. It contains multiple genes, although fewer than the X.
True or false, and why? “All genes on X and Y control sex characteristics.”
Reveal answer
False. The X carries many genes with other functions.
True or false, and why? “XX and XY describe every person without exception.”
Reveal answer
False. They are common patterns; chromosome and developmental variation exists.
Which sex chromosomes does a human female usually have?
Reveal answer
XX.
Key words: XX
Which sex chromosomes does a human male usually have?
Reveal answer
XY.
Key words: XY
How many pairs of chromosomes in a human body cell are sex chromosomes?
Reveal answer
One pair (the other 22 pairs are autosomes).
Key words: one