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level: Level 1

Questions and Answers List

level questions: Level 1

Question	Answer
term used to describe a cell which has two sets of genetic information	Diploid
A part of a cell where chromosomes are found	nucleus
The cord attached to a human fetus to the placenta	umbilical cord
A group of similar organisms that interbreed to produce offspring	species
the number of pairs of chromosomes in a human body cells	twenty three
Type of cell which has a cell wall	Plant
The shape of DNA	Double helix
type of variation where the characteristics can be used to divined up a population into distinct groups	Discrete variation
The four letters used to represent the four bases of DNA	AT GC
Factors which affect normal development of an embryo	teratogens
A change in the number or structure of chromosomes	mutation
Fertilisation happen here	oviduct
sperm, eggs, pollrn and ovules are these	gametes
A piece of information on a chromosome	gene
an organism which can produce gametes that are viable to be said this	fertile
define a species	a group of similar organisms that interbreed to produce fertile offspring
explain fertile	an organism can produce gamest that are viable
explain what infertile and sterile mean	sterile means that an organism is unable to produce gametes that are fertile
give an example of similar organisms that interbreed to produce hybrid offspring which is sterile	liger, mule
Describe discrete variation	a characteristic that can be used to dived up the population into distinct groups like hair eye colour
describe continuous variation	a characteristic that varies from on extreme to another like how much you way
what does genetic information state	the characteristics or appearance of an organism
state that normal body cells are diploids and have two sets if chromosomes	yes
at Fertilisation the zygote is diploid gaining a chromosome set from each gamete	yes
how many pair of chromosomes in a normal human body cell	23 pairs
where does human fertilisation start	oviduct
what is the next stage of when a zygote divides into more cells called	blastocyst