Monohybrid Cross

What is a monohybrid cross?

A cross between two true-breeding parents which differ by one respect
What type of variation did Gregor Mendel's crosses with peas show?

Discontinuous variation
What is the phenotypic ratio always produced in a monohybrid cross?

3 : 1
Why is the exact phenotypic ratio, in a monohybrid cross, rarely produced?

As fertilisation is a random process involving an element of chance
The "Principle of Segregation" states that the alles of a gene exist in pairs but when gametes are formed the members of each pair pass into _______ gametes?

different
What is Incomplete dominance?

When one allele of a gene is not completely dominant over the other allele
What is a backcross?

Crossing an organism with an unknown genetype with an organism showing the recessive characteristics and examining the offspring
What must be the geneotype of parent Y?

Y x tt
↓
all Tt

TT
What must be the genotype of parent Y?

Y x tt
↓
Tt : tt (simplified ratio)

Tt

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Card Set

Monohybrid Cross

Description

Higher Biology - Unit Two - Monohybrid Cross

Updated

2011-12-28T16:57:31Z

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