Genetics practice problems
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Genetics Practice Problems. Ratios. 1. What would be the genotypic and phenotypic ratios be for a cross between a true-breeding tall pea plant and a true-breeding short pea plant?. 2. What would be the phenotypic ratio be for the following cross: Tt x tt.

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Genetics Practice Problems

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Genetics practice problems

Genetics Practice Problems


Ratios

Ratios


Genetics practice problems

1. What would be the genotypic and phenotypic ratios be for a cross between a true-breeding tall pea plant and a true-breeding short pea plant?


2 what would be the phenotypic ratio be for the following cross tt x tt

2. What would be the phenotypic ratio be for the following cross:Tt x tt


3 what would be the genotypic and phenotypic ratio for the following cross tt x tt

3. What would be the genotypic and phenotypic ratio for the following cross:Tt x Tt


4 what would be the genotypic and phenotypic ratios for the following cross ttaa x ttaa

4. What would be the genotypic and phenotypic ratios for the following cross:TTAA x ttaa


5 what would be the phenotypic ratio for the following cross ttaa x ttaa

5. What would be the phenotypic ratio for the following cross:TtAa x ttaa


6 what would be the genotypic and phenotypic ratios for the following cross ttaa x ttaa

6. What would be the genotypic and phenotypic ratios for the following cross:TtAa x TtAa


Genetics practice problems

7. In cows, roan coat color is caused by having one red allele (R) and one white allele (W). What is the genotypic ratio of the following cross:RR x WW


8 what is the phenotypic and genotypic ratio of the following cross rw x rw

8. What is the phenotypic and genotypic ratio of the following cross:RW x RW


Genetics practice problems

9. In snapdragons, red flower color (R) is incompletely dominant to white flower color (R’), what is the phenotypic and genotypic ratio for the following cross:RR x R’R’


10 what are the phenotypic and genotypic ratios of the following cross rr x rr

10. What are the phenotypic and genotypic ratios of the following cross:RR’ x RR’


Genetics practice problems

11. In Guinea Pigs, 2 genes control coat color. One gene controls whether they will be colored (A) or albino (a). The other gene determines if they will be black (B) or brown (b). What type of inheritance pattern is this?


12 what will be the phenotypic ratio of the following crosses

12. What will be the phenotypic ratio of the following crosses:

AaBB x Aabb

AaBb x AaBb

AaBB x aaBb

AaBb x aabb


Probabilities

Probabilities

Calculate the probabilities of the production of the offspring for each cross


Aabb x aabb

AAbb x aaBB

AaBB


Aabbcc x aabbcc

AaBbCc x AaBbCc

AAbbCc

AABBCC

AaBbCc

aabbcc


Non mendelian inheritance patterns

Non-Mendelian Inheritance Patterns


Many genes control the expression of one trait

Many genes control the expression of one trait.


One gene has many phenotypic effects

One gene has many phenotypic effects.


In a heterozygote both alleles are expressed individually

In a heterozygote, both alleles are expressed individually.


In a heterozygote the phenotype expressed is blended between what the alleles actually code for

In a heterozygote, the phenotype expressed is blended between what the alleles actually code for.


2 genes affect one trait but one gene controls the expression of the 2 nd gene

2 genes affect one trait, but one gene controls the expression of the 2nd gene.


Spermatogenesis and oogenesis

Spermatogenesis and Oogenesis


How many gametes are produced during oogenesis

How many gametes are produced during oogenesis?

What is the scientific name for the gamete?


When does spermatogenesis begin

When does spermatogenesis begin?


How many gametes are produced during spermatogenesis

How many gametes are produced during spermatogenesis?


When does oogenesis begin

When does oogenesis begin?


Gene mapping

Gene Mapping


B bvg vg x bbvgvg

b+bvg+vg x bbvgvg

  • Wild Type: 750

  • Double Mutant:764

  • Black – Normal:120

  • Grey – Vestigial: 166

  • What is the recombination frequency?


Linkage map

Linkage Map

  • A-B = 23 mu

  • A-C = 12 mu

  • B-C = 11 mu


Linkage map1

Linkage Map

  • A-B = 10

  • A-C =5

  • A-D = 18

  • B-C = 15

  • B-D = 8

  • C-D = 23


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