Docsity
Log inSign up
Docsity
Prepare for your exams
Prepare for your exams

Study with the several resources on Docsity

Earn points to download
Earn points to download

Earn points by helping other students or get them with a premium plan

Guidelines and tips
Guidelines and tips
Sell on Docsity
Sell on Docsity
Log inSign up

Prepare for your exams

Study with the several resources on Docsity

Find documents

Prepare for your exams with the study notes shared by other students like you on Docsity

Search Store documents

The best documents sold by students who completed their studies

Search through all study resources
Docsity AINEW

Summarize your documents, ask them questions, convert them into quizzes and concept maps

Explore questions

Clear up your doubts by reading the answers to questions asked by your fellow students

Earn points to download

Earn points by helping other students or get them with a premium plan

Share documents
download point icon20 Points

For each uploaded document

Answer questions
download point icon5 Points

For each given answer (max 1 per day)

All the ways to get free points
Get points immediately

Choose a premium plan with all the points you need

Study Opportunities

Choose your next study program

Get in touch with the best universities in the world. Search through thousands of universities and official partners

Community

Ask the community

Ask the community for help and clear up your study doubts

University Rankings

Discover the best universities in your country according to Docsity users

Free resources

Our save-the-student-ebooks!

Download our free guides on studying techniques, anxiety management strategies, and thesis advice from Docsity tutors

From our blog

Exams and Study
Go to the blog

Mendelian Principles – Work Sheet 1, Study Guides, Projects, Research of Genetics

Gwynedd Mercy UniversityGenetics

Heredity Worksheets. Page - 1. Mendelian Principles – Work Sheet 1 ... Use the Punnett square to determine all of the offspring genotypes (and their ...

Typology: Study Guides, Projects, Research

2021/2022

Uploaded on 09/12/2022

shashwat_pr43
shashwat_pr43 🇺🇸

4.5

(15)

233 documents

1 / 8

Toggle sidebar

This page cannot be seen from the preview

Don't miss anything!

bg1
Heredity Worksheets Page - 1
Mendelian Principles – Work Sheet 1 Biology 30
Name: _______________
1. For each of the diploid genotypes presented below, determine the genetic make up for all of
the possible haploid gametes.
a. Rr
b. RrYy
c. rrYy
d. RrYY
e. RrYyBb
2. Use the Punnett square to determine all of the offspring genotypes (and their relative
frequencies) from the following crosses:
a. Rr x Rr
b. Rr x rr
c. RR x Rr
3. In the problem above, the "R" allele is a dominant allele specifying for round seeds (in peas),
while the "r" allele is the recessive allele specifying for wrinkled seeds. Give the expected
frequencies (as percentages or ratios) for the phenotypes of the offspring resulting from each
of the crosses above.
pf3
pf4
pf5
pf8

Partial preview of the text

Download Mendelian Principles – Work Sheet 1 and more Study Guides, Projects, Research Genetics in PDF only on Docsity!

Mendelian Principles – Work Sheet 1 Biology 30

Name: _______________

  1. For each of the diploid genotypes presented below, determine the genetic make up for all of the possible haploid gametes. a. Rr b. RrYy c. rrYy d. RrYY e. RrYyBb
  2. Use the Punnett square to determine all of the offspring genotypes (and their relative frequencies) from the following crosses: a. Rr x Rr b. Rr x rr c. RR x Rr
  3. In the problem above, the "R" allele is a dominant allele specifying for round seeds (in peas), while the "r" allele is the recessive allele specifying for wrinkled seeds. Give the expected frequencies (as percentages or ratios) for the phenotypes of the offspring resulting from each of the crosses above.
  1. In humans, brown eyes are dominant over blue eyes. A woman with blue eyes marries a man with brown eyes. This man’s father had blue eyes. a. What would be the genotype of the man that married the blue-eyed woman? b. What would be the genotype of the blue-eyed woman? c. What are all the possible gametes related to eye colour that could be produced from this man and woman? d. What will be the ratio of children with blue eyes from this marriage?
  2. Would it make a difference to the question above, if the man had blue eyes and the woman had brown eyes, with the woman’s father having blue eyes?
  3. If a brown-eyed man marries a blue-eyed woman and they have ten children who all have brown eyes, what would the likely genotype of the father? Can you be certain of the man’s genotype?
  4. If three of the children had blue eyes in the above question, what would be the genotype of the father? Can you be certain of the man’s genotype?
  5. Thalassemia is a type of human anemia controlled by a defective gene, t. The normal allele, T , produces hemoglobin normally. The disease occurs in two forms, minor and major. The major is more severe. Individuals with the major form are homozygous for the recessive allele and individuals with the minor form are heterozygous. a) Show the expected offspring between two parents, both of whom have thalassemia minor. b) Draw a punnett square to support your answer.
  1. A brown mink crossed with a silverblue mink produced all brown offspring. When these F 1 mink were crossed among themselves they produced 47 brown animals and 15 silverblue animals (F 2 generation). Determine all the genotypes and phenotypes, and their relative ratios, in the F 1 and F 2 generations.
  2. In sheep white is due to a dominant gene (W), black to its recessive allele (w). A white ewe mated to a white ram produces a black lamb. If they produce another offspring, could it be white? If so, what are the chances of it being white? List the genotypes of all animals mentioned in this problem.
  3. In tomatoes the texture of the skin may be smooth or peach (hairy). The Ponderosa variety has fruits with smooth texture. The red peach variety has fruits with peach texture. Crosses between the two varieties produce all smooth fruits. Crosses between these smooth fruited F 1 plants produced 174 peach textured fruits and 520 smooth textured fruits. How are these skin textures inherited?
  4. A brown mouse is mated is mated with two female black mice. When each female has produced several litters of young, the first female has had 48 black and the second female has had 14 black and 11 brown young. Deduce the pattern of inheritance of coat color and the genotypes of all of the parents.

Mendelian Principles – Work Sheet 3 Biology 30

(Probability, Mono and Dihybrid) Name: _______________

  1. The ability to taste the chemical PTC is determined by a single gene in humans with the ability to taste given by the dominant allele T and inability to taste by the recessive allele t. Suppose two heterozygous tasters (Tt) have a large family. a. Predict the proportion of their children who will be tasters and nontasters. Use a Punnett square to illustrate how you make these predictions. b. What is the likelihood that their first child will be a taster? What is the likelihood that their fourth child will be a taster? c. What is the likelihood that the first three children of this couple will be nontasters?
  2. A husband and wife are both heterozygous for a recessive gene, c , for albinism. They were informed that they will have dizygotic wins, a boy and a girl. a. Draw a Punnett square of this cross. b. What are the chances that one child will be albino? c. What are the chances that both children will be normal? d. What are the chances that both babies will have the same phenotype for skin pigmentation?
  3. In pepper plants, green (G) fruit color is dominant to red (g) and round (R) fruit shape is dominant to square (r) fruit shape. These two genes are located on different chromosomes. a. What gamete types will be produced by a heterozygous green, round plant? b. If two such heterozygous plants are crossed, what genotypes and phenotypes will be seen in the offspring and in what proportions?

Mendelian Principles – Work Sheet 4 Biology 30

(incomplete dominance, mono and dihybrid) Name: _______________

  1. Let's assume that hair color in humans is a simple genetic situation (it really isn't). Assume there are two alleles for hair color - a dominant allele for dark hair and a recessive allele for light hair. A dark haired woman whose father is light haired marries a light haired man. Use a Punnett Square to determine the expected phenotypes and genotypes of the children.
  2. The gene for bent little fingers is dominant over the gene for straight fingers. Two bent fingered people have a straight fingered child. What are the genotypes of all three?
  3. Brown eyes is dominant over blue eyes. Dark hair is dominant over light hair. The mother is brown eyed with light hair. The father is blue eyed with dark hair. The child is blue eyed with light hair. What are the genotypes of all three?
  4. In short horned cattle, red is co-dominant with white. The hybrid is called roan. A roan mates with a roan. Use a Punnett Square to determine the expected phenotypes of the offspring.
  5. The alleles for hair type show incomplete dominance One allele (c) is for curly hair. Another allele (s) is for straight hair. The hybrid is wavy. A wavy haired person marries a curly haired person. Use a Punnett Square to determine the expected phenotypes in the children.
  6. Dark hair is dominant over light hair. A man with light hair has a dark haired daughter. What is the phenotype of the mother? The daughter marries a dark haired man. They have 20 children all with dark hair. What is the most likely genotype of the husband?
  1. In pigeons, ruffled feathers are dominant over smooth feather. A ruffled pigeon whose mother was smooth is crossed with a ruffled pigeon. The first chick has smooth feathers. What are the genotypes of the chick, its parents and the grandmother?
  2. What gametes could the genotype BbRR produce? What gametes could the genotype BbRr produce. Use a Punnett Square to determine the possible genotypes of their offspring. How many different genotypes are there? How many different phenotypes are there? (the answer here would describe the possibilities in terms of having the dominant or recessive trait for each pair of genes- for example, BbRR would be "dominant/dominant" whereas bbRR would be "recessive/dominant")
  3. A rooster with grey feathers is mated with a hen of the same phenotype. Among their offspring 15 chicks are grey, 6 are black and 8 are white. a. What is the simplest explanation for the inheritance of these colors in chickens? b. What offspring would you expect from the mating of a grey rooster and a black hen?
  1. Color patterns in a species of duck is determined by one gene with three alleles. Alleles H and I are semidominant (i.e., incomplete dominance), and allele i is recessive to both. How many phenotypes are possible in a flock of ducks that contains all the possible combinations of these three alleles.
  2. In corn plants, a dominant allele I inhibits kernal color, while the recessive allele i permits color when homozygous. At a different locus, the dominant gene P causes purple kernel color, while the homozygous recessive genotype pp causes red kernels. If plants heterozygous at both loci are crossed, what will be the phenotypic ratio of the F 1 generation?