Question

MAJOR HELP PLEASE!!!! WILL MEDAL FOR BEST ANSWER @SolomonZelman, @IronPatriot, @dan815, @Compassionate, @Agl202 thanks so much!!!!

Answer 1

yes...

Answer 2

Please help me!!!!


Lab Report: 4.04 & 4.05 Genetic Crosses

** Before beginning this assignment, please read the slides
in your Biology course for lessons 4.04 and 4.05.**

Here are some notes to help you:

Alleles – versions of the same gene – individuals inherit 2 alleles for each gene, 1 from each parent

Dominant Allele - the allele associated with a trait which is expressed even if only 1 copy of the allele is present (so this dominant trait will show up even if a recessive trait is present)

Recessive Allele - the allele associated with a trait which is expressed only if 2 copies of the allele are present (this recessive trait will not show up if there is a dominant trait present)

Genotype – an organism’s genetic makeup – the set of alleles for a specific trait

Phenotype – an organism’s physical appearance – how it looks based on the genotype

Homozygous Genotype – organism has 2 identical alleles for a gene

Heterozygous Genotype – organism has 2 different alleles for a gene

P generation (parents) → F1 generation (offspring from parents) → F2 generation (offspring from F1)

Setting up a Punnett Square:







If you need more help with these concepts, here is an instructional video for you. It introduces important vocabulary and explains Punnett Squares.

https://www.youtube.com/watch?v=i-0rSv6oxSY

Part 1: Monohybrid Cross - Predicting Freckles in an F1 Generation

Some characteristics in people are inherited as simple dominant and recessive traits. One example is freckles. The allele for having freckles (F) is dominant over the allele for not having freckles (f), which is recessive. So, having freckles is a dominant trait, and the lack of freckles is a recessive trait.

In this example, a person with freckles would have the genotype of either FF or Ff because the dominant F is present. A person with no freckles is represented with the genotype ff.

genotype for freckles: FF or Ff genotype for no freckles: ff

(2 points)
Score

1. Imagine a mother and a father who both have freckles and are heterozygous for the trait, (have the genotype Ff). They are the P (parent) generation. Complete the Punnett square to show their offspring, the F1 generation. Be sure to write the letter for an allele on each bold line.

Example Punnett Square for #1
Parent 1 Allele #1 Parent 1 Allele #2

Parent 2 Allele #1 Offspring genotype
#1- 25% chance Offspring genotype
#2 – 25% chance
Parent 2 Allele
#2 Offspring genotype
#3 – 25% chance Offspring genotype
#4 – 25% chance


_F_
_f_


_F_
_F _F

F f

_f_
F f


f f

(2 points)
Score

2. What are the possible genotypes (both alleles) and phenotypes (physical appearances) of the offspring (F1 generation)?
Genotypes: __F_ _F__
Phenotypes:

Score

(1 point)
3. What is the percent chance the offspring will have freckles?

(Hint: Each square is 25%, so add together 25% for each
square that will produce a phenotype with freckles.)

Answer 3

Please help me figure this out I don't know nothing about Punett squares I suck at it please help!!!!!!