2013 Flashcards
1
Q
What is the hormone produced by developing embryo which breakdown corpus luteum
A
HCG
2
Q
Why are some phenotype of some offspring more common than expected and others very rare?
A
Incomplete linkage Genes far apart on same chromosome Crossing over occurs Four types of gametes produced Small numbers of recombinant a Recombinant equal same number
3
Q
What is meant by sex linkage?
A
Genes on XY chromosomes
4
Q
Suggest why there has been little change in the phenotype and no population recovery after closing fishing for 20 years
A
Small dish produces less gametes
Not enough food
Change in temp and pH
5
Q
What is DNA polymerase?
A
Used for catalysing the joining of nucleotides to end of DNA chain
6
Q
What is an allele?
A
Different forms of the same gene
7
Q
Why is one functional female gamete produced as a result of meiosis?
A
Polar bodies produced
Functional gamete retains cytoplasm which acts as food store for zygote
Needed until plantation takes place
