Homework Help: Science

Posted by Gabby on Friday, January 25, 2013 at 1:46am.

1.
How many chromosomes do human sex cells have? (1 point)

22
43
46
23

2.
The actual genetic makeup of an organism for a particular trait is called the ______. The physical characteristic that trait gives the organisms is called the ______. (1 point)

genotype; phenotype
genome; allele
dominant; recessive
none of the above

3.

Of the following, which represents a homozygous recessive genotype?
(1 point)

TT
Tt
tt
TTT

4.
Structures in organisms that are no longer of use are called ______ structures. (1 point)

homologous
obsolete
vestigial
analogous

5.
Change in the hereditary features of a type of organism over time is ______. (1 point)

growth
biogenesis
spontaneous generation
evolution

6.
Studying the early growth and development of animals provides clues to their shared ancestry; this field of study is called ______. (1 point)

embryology
ecology
radiology
oncology

oh wait nvm /)_-

Science - Devron, Friday, January 25, 2013 at 1:55am
1. 23
2. genotype; phenotype
3. tt
4. vestigial
5. evolution
6. None seem correct to me, so I do not know.
Science - Devron, Friday, January 25, 2013 at 5:26am
Sorry, should have paid a little bit closer attention to number 6. The best answer for that one is embryology.
Science - Devron, Friday, January 25, 2013 at 5:28am
Sorry, should have paid a little bit closer attention to number 6. The best answer for that one is embryology.
Science - Somebody, Friday, January 25, 2013 at 2:30pm
lol, Im doing the same test right now...

Ill tell you the answers once im done...
Science - Devron, Friday, January 25, 2013 at 4:07pm
1. is 46
Science - Devron, Friday, January 25, 2013 at 4:12pm
Scratch that, number 1 is 23. Human sex cells undergo division by meiosis. 46 to 23. All other cells undergo cell division by mitosis 46 to 46.
Science - Somebody, Friday, January 25, 2013 at 5:57pm
D
A
C
C
D
A

100% correct
Science - Somebody, Friday, January 25, 2013 at 6:46pm
Yegh, thats because its 23 PAIRS
Science - Somebody, Friday, January 25, 2013 at 7:23pm
Well... for some reason it wants pairs.... I put 46 cause I saw 23 pairs so i times it by 2 and got it wrong... >=\
Science - Devron, Friday, January 25, 2013 at 7:47pm
GIt them all right. Yay me!!!!!!!!!!!! :-)
Science - Anonymous, Thursday, January 31, 2013 at 10:56pm
ya thx guys

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