Heredity 2- one gene/two genes

Heredity 2- one gene/two genes

6th - 8th Grade

17 Qs

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Heredity 2- one gene/two genes

Heredity 2- one gene/two genes

Assessment

Quiz

Science

6th - 8th Grade

Easy

Created by

Shannon Lafrate

Used 1+ times

FREE Resource

17 questions

Show all answers

1.

OPEN ENDED QUESTION

1 min • 1 pt

In cats, long hair is recessive to short hair. A true-breeding (homozygous) short-haired male is mated to a long-haired female. What will their kittens look like?

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2.

OPEN ENDED QUESTION

1 min • 1 pt

Two cats are mated. One of the parent cats is long-haired. The litter which results contains two short-haired and three long-haired kittens. What does the second parent look like and what is its genotype?

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3.

OPEN ENDED QUESTION

1 min • 1 pt

Mr. and Mrs. Smith both have widow's peaks (dominant). Their first child has a widow's peak, but their second child doesn't. Mr. Smith accuses Mrs. Smith of being unfaithful to him. Is he necessarily justified? Why or why not? Work the genetics problem predicting the frequencies of the versions of this trait among their prospective children.

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4.

OPEN ENDED QUESTION

1 min • 1 pt

Mr. and Mrs. Jones have six children. Three of them have attached earlobes (recessive) like their father, and the other three have free earlobes like their mother. What are the genotypes of Mr. and Mrs. Jones and their numerous offspring?

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5.

OPEN ENDED QUESTION

1 min • 1 pt

Mr. and Mrs. Anderson both have tightly curled hair. (The hair form gene shows incomplete dominance. There are two alleles, curly and straight. The heterozygote has wavy hair). The Andersons have a child with wavy hair. Mr. Anderson accuses Mrs. Anderson of being unfaithful to him. Is he necessarily justified? Why or why not?

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6.

OPEN ENDED QUESTION

1 min • 1 pt

Two wavy haired people (one male and one female) marry and have eight children. Of these eight, how many would you expect to be curly haired, how many wavy haired and how many straight haired, assuming that the family follows the expected statistically predicted pattern? Suppose you examine the actual children and discover that three of the eight have curly hair. What do you suppose went wrong?

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7.

OPEN ENDED QUESTION

1 min • 1 pt

Basic body color for horses is influenced by several genes, one of which has several different alleles. Two of these alleles - the chestnut (dark brown) allele and a diluting (pale cream) allele (often incorrectly called albino)--- display incomplete dominance. A horse heterozygous for these two alleles is a palomino (golden body color with a flaxen mane and tail). Is it possible to produce a herd of pure-breeding palomino horses? Why or why not. Work the Punnett's square for mating a palomino to a palomino and predict the phenotype ratio among the offspring.

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