Item 23 refers to the following diagram which shows a pair of homologous
chromosomes, heterozygous for two gene
loci, Aa and Bb.

23.
If crossing over takes place in Region 1,
which of the following alleles will segregate
at Meiosis I?

a) A from a
b) a from a
c) b from b
d) A from A

the unequal cytoplasmic division that  results  in  one egg  and three polar bodies ensures that a fertilized  egg has  ample nutrients  forits journey  to  the uterus.

the dna of humans and mice is almost 92% similar. this similarity indicates that . mice have a tail, while humans have a tailbone. the tailbone is a structure in humans.yes it's true.

kelp are large brown algae that live in cool, relatively shallow waters close to the shore. they grow in dense groupings much like a forest on land. these underwater towers of kelp provide food and shelter for thousands of fish, invertebrates, and marine mammal species.

e) all of the above