RE1 PRACTICE QUESTIONS Genetics Flashcards
a heterozygous, black-eyed male mouse is crossed with a red-eyed female mouse. determine the offspring. Black eyes are dominate over red eyes
In humans, free earlobes(F) are dominant over attached earlobes(f). If one parent is homozygous dominant for free earlobes, while the other has attached earlobes, can they produce any children with attached earlobes?
A heterozygous red flower is crossed with a recessive white flower. What is the chance of having a white flower? SHOW THE CROSS AS WELL AS THE GENOTYPIC AND PHENOTYPIC RATIOS
Dimples are a dominant trait in humans. If two parents have dimples, one is heterozygous and the other is homozygous dominant, what is the probability of having a child with dimples? SHOW THE CROSS AS WELL AS THE GENOTYPIC AND PHENOTYPIC RATIOS
What are the chances of having a child with a recessive widow’s peak if one parent has one and the other parent is homozygous normal for hairline? SHOW THE CROSS AS WELL AS THE GENOTYPIC AND PHENOTYPIC RATIOS
Show the cross and give the genotypic and phenotypic ratios of the expected offspring between a flower having an allele of each for height(both tall and short) and a flower which is recessive short.
what are the chances of a brown-eyed woman and her blue-eyed husband having a blue-eyed baby? Her mother has brown eyes and her father has blue eyes. His mother has brown eyes too and his father has blue eyes.
short eyelashes are recessive in humans. A woman with long lashes and her long-lashed husband have a child with short lashes. Her mother had long lashes and her father had short lashes. his mother had long lashes and his father also had long lashes. SHOW THE CROSS AS WELL AS THE GENOTYPIC AND PHENOTYPIC RATIOS
Two plants have 300 offspring. If they were both heterozygous for seed shape and their shape was smooth, how many of the offspring would be suspected to be wrinkled for shape?
black is recessive to white for sheep colour. What are the 3 possible crosses which one could do to ensure that black sheep were produced?
A woman with homozygous dominant curly hair is artificially inseminated by a donor with curly hair. Show the cross and show the probability of having a straight-haired child if the donor’s mother had straight hair.
two phenotypically normal people have a child who is albino(a genetic disorder where the skin is lacking all pigment). If the parents appear to be normal, but they have a child who is albino, what would their geno types be? SHOW THE CROSS AS WELL AS THE GENOTYPIC AND PHENOTYPIC RATIOS
