2. Simple Monohybrid Crosses Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

Are gametes haploid or diploid

A

Haploid

They contain only one allele for each gene

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2
Q

What happens when haploid gametes fuse together ?

A

The alleles they contain form the genotype of the diploid offspring

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3
Q

Why are genetic diagrams used?

A

They show how alleles are passed on to next generation.

And they predict genotypes and phenotypes of the offspring.

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4
Q

Monohybrid inheritance

A

Is the inheritance of a characteristic controlled by a single gene.

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5
Q

Monohybrid crosses

A

Show the likelihood of the different alleles of that gene (different versions of the characters) being inherited by offspring.

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6
Q

First set of offspring

A

F1 generation

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7
Q

What will a monohybrid cross with 2 homozygous parents always produce ?

A

ALL heterozygous offspring in F1 generation

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8
Q

Phenotypic ratio

A

Is the ratio of different phenotypes in the offspring.

Genetic diagrams allows you to predict phenotypic rations in F1 and F2 offspring

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9
Q

What is the typical ratio with 2 heteozygous parents?

A

3:1

Dominant : recessive

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10
Q

Example of co dominant alleles

A

Sickle cell anaemia

Genetic disorder caused by mutation in haemoglobin gene.

Caused by red blood cells to be sick shaped

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11
Q

Example.

What if the person is heterozygous for normal haemoglobin and sick cell haemoglobin?

A

They will have a sickle cell trait.

Some normal haemoglobin
Some sick haemoglobin

Alleles are co dominant as both expressed in phenotype.

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12
Q

What is typical ratio you would expect to see with 2 heterozygous patents involving co dominance .

A

1 : 2 : 1 ratio in offspring

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13
Q

If you’re asked to find probability of something. How can you write it ?

A

Decimal
Fraction
%

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