Q: WHAT IS AN ORGANISM'S GENETIC MAKEUP CALLED?

GENOTYPE. The genotype is the set of alleles an organism carries; the phenotype is how they're expressed.

Q: AN ALTERNATIVE VERSION OF A GENE IS CALLED AN ___.

ALLELE. Alleles are different forms of the same gene found at the same locus.

Q: WHAT TERM MEANS HAVING TWO IDENTICAL ALLELES OF A GENE?

HOMOZYGOUS. A homozygous organism has two identical alleles, e.g. AA or aa.

Q: WHAT IS A POSITION OF A GENE ON A CHROMOSOME CALLED?

A LOCUS. A locus is the fixed position of a gene on a chromosome.

Q: A DIAGRAM USED TO PREDICT CROSS OUTCOMES IS A ___ SQUARE.

PUNNETT. A Punnett square predicts the genotype and phenotype ratios of offspring.

Q: A DIHYBRID CROSS OF TWO HETEROZYGOTES GIVES WHICH RATIO?

9 : 3 : 3 : 1. AaBb x AaBb gives a 9:3:3:1 phenotypic ratio when genes assort independently.

Q: WHEN BOTH ALLELES ARE FULLY EXPRESSED, THEY ARE ___.

CODOMINANT. In codominance both alleles are expressed, as in the AB blood group.

Q: WHICH HUMAN CHROMOSOMES DETERMINE BIOLOGICAL SEX?

X AND Y. The X and Y chromosomes are the sex chromosomes; XX is female, XY is male.

Q: WHAT IS THE INHERITANCE OF A TRAIT CONTROLLED BY MANY GENES?

POLYGENIC. Polygenic traits are controlled by several genes, giving continuous variation.

Q: WHICH TEST CHECKS IF OBSERVED RATIOS MATCH EXPECTED RATIOS?

CHI-SQUARED. The chi-squared test compares observed and expected genetic ratios for significance.

Question 1

WHAT IS AN ORGANISM'S GENETIC MAKEUP CALLED?

Accepted Answer

GENOTYPE

Question 2

AN ALTERNATIVE VERSION OF A GENE IS CALLED AN ___.

Accepted Answer

ALLELE

Question 3

WHAT TERM MEANS HAVING TWO IDENTICAL ALLELES OF A GENE?

Accepted Answer

HOMOZYGOUS

Question 4

THE PHYSICAL EXPRESSION OF AN ORGANISM'S GENES IS ITS...?

Accepted Answer

PHENOTYPE

Question 5

AN ALLELE EXPRESSED ONLY WHEN HOMOZYGOUS IS SAID TO BE ___.

Accepted Answer

RECESSIVE

Question 6

WHAT IS A POSITION OF A GENE ON A CHROMOSOME CALLED?

Accepted Answer

A LOCUS

Question 7

A DIAGRAM USED TO PREDICT CROSS OUTCOMES IS A ___ SQUARE.

Accepted Answer

PUNNETT

Question 8

A HETEROZYGOUS CROSS Aa x Aa GIVES WHAT PHENOTYPE RATIO?

Accepted Answer

3 : 1

Question 9

A DIHYBRID CROSS OF TWO HETEROZYGOTES GIVES WHICH RATIO?

Accepted Answer

9 : 3 : 3 : 1

Question 10

WHEN BOTH ALLELES ARE FULLY EXPRESSED, THEY ARE ___.

Accepted Answer

CODOMINANT

Question 11

IN HUMANS, WHICH BLOOD GROUP SHOWS CODOMINANCE?

Accepted Answer

GROUP AB

Question 12

A CROSS WITH A HOMOZYGOUS RECESSIVE TO FIND AN UNKNOWN GENOTYPE IS A ___ CROSS.

Accepted Answer

TEST

Question 13

WHICH RATIO RESULTS FROM A TEST CROSS OF A HETEROZYGOTE?

Accepted Answer

1 : 1

Question 14

GENES ON THE SAME CHROMOSOME INHERITED TOGETHER ARE SAID TO BE...?

Accepted Answer

LINKED

Question 15

A GENE FOUND ONLY ON THE X CHROMOSOME SHOWS SEX ___.

Accepted Answer

LINKAGE

Question 16

WHICH HUMAN CHROMOSOMES DETERMINE BIOLOGICAL SEX?

Accepted Answer

X AND Y

Question 17

A FEMALE WITH ONE RECESSIVE SEX-LINKED ALLELE IS A ___.

Accepted Answer

CARRIER

Question 18

RED-GREEN COLOUR BLINDNESS IS COMMON IN MALES BECAUSE THEY?

Accepted Answer

HAVE ONE X CHROMOSOME

Question 19

WHAT IS THE INHERITANCE OF A TRAIT CONTROLLED BY MANY GENES?

Accepted Answer

POLYGENIC

Question 20

VARIATION SHOWING A RANGE OF VALUES, LIKE HEIGHT, IS ___ VARIATION.

Accepted Answer

CONTINUOUS

Question 21

IN THE HARDY-WEINBERG EQUATION, WHAT DOES 2pq REPRESENT?

Accepted Answer

HETEROZYGOTE FREQUENCY

Question 22

THE PASSING OF TRAITS FROM PARENTS TO OFFSPRING IS CALLED ___.

Accepted Answer

HEREDITY

Question 23

WHICH TEST CHECKS IF OBSERVED RATIOS MATCH EXPECTED RATIOS?

Accepted Answer

CHI-SQUARED

Question 24

AN ALLELE EXPRESSED EVEN WHEN HETEROZYGOUS IS SAID TO BE ___.

Accepted Answer

DOMINANT

Question 25

WHICH CELL DIVISION PRODUCES GENETICALLY VARIED GAMETES?

Accepted Answer

MEIOSIS

GENETICS AND INHERITANCE

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